Answers created by Morgan
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Question #b9bfa
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A ball with a mass of #4 kg # and velocity of #3 m/s# collides with a second ball with a mass of #2 kg# and velocity of #- 8 m/s#. If #10%# of the kinetic energy is lost, what are the final velocities of the balls?
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A box with an initial speed of #3 m/s# is moving up a ramp. The ramp has a kinetic friction coefficient of #3/4 # and an incline of #pi /8 #. How far along the ramp will the box go?
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How do you solve #1.7xx10^(-1)=(x^2)/(0.60-x)# for #x#?
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How much work would it take to push a # 1 kg # weight up a # 6 m # plane that is at an incline of # pi / 3 #?
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A toy car is pushed the edge of a table with an initial horizontal velocity of 2 m/s. If the table is 1 meter high, how far horizontally from the edge of the table does the toy car land?
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An object with a mass of #8 kg# is on a plane with an incline of # - pi/3 #. If it takes #16 N# to start pushing the object down the plane and # 15 N# to keep pushing it, what are the coefficients of static and kinetic friction?
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An electric toy car with a mass of #4 kg# is powered by a motor with a voltage of #8 V# and a current supply of #15 A#. How long will it take for the toy car to accelerate from rest to #5 m/s#?
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If a #3/2 kg# object moving at #5/3 m/s# slows to a halt after moving #4/3 m#, what is the coefficient of kinetic friction of the surface that the object was moving over?
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A wrench with a length of #15 cm# is used to unscrew a #5/2 cm# bolt. If a torque of #15 Nm# is needed to overcome the friction keeping the bolt in place, what is the minimum torque that must be applied to the wrench to unscrew the bolt?
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Question #2212e
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Two charges of # 9 C # and # 5 C# are positioned on a line at points # 2 # and # -4 #, respectively. What is the net force on a charge of # 3 C# at # -2 #?
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If your stereo uses 192 watts of power, and a current of 1.6A flows through it, what is the voltage of the source?
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An object with a mass of #2 kg# is revolving around a point at a distance of #4 m#. If the object is making revolutions at a frequency of #4 Hz#, what is the centripetal force acting on the object?
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An object with a mass of # 2 kg# is traveling in a circular path of a radius of #4 m#. If the object's angular velocity changes from # 3 Hz# to # 8 Hz# in # 2 s#, what torque was applied to the object?
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A projectile is shot from the ground at an angle of #pi/4 # and a speed of #9 m/s#. Factoring in both horizontal and vertical movement, what will the projectile's distance from the starting point be when it reaches its maximum height?
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A box with an initial speed of #8 m/s# is moving up a ramp. The ramp has a kinetic friction coefficient of #4/5 # and an incline of #( pi )/6 #. How far along the ramp will the box go?
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What is the theory of everything?
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An electric toy car with a mass of #1 kg# is powered by a motor with a voltage of #12 V# and a current supply of #4 A#. How long will it take for the toy car to accelerate from rest to #2/5 m/s#?
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Hey ,I am too much confused in taking the sign of g (means in equations like F=mg g should be eq
ual to -9.8m/s2 or 9.8m/s2?
Please answer with complete explanation..
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How do you name epoxides using IUPAC?
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A ball with a mass of #420 g# is projected vertically by a spring loaded contraption. The spring in the contraption has a spring constant of #35 (kg)/s^2# and was compressed by #9/4 m# when the ball was released. How high will the ball go?
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A particle is moving in x - axis according to relation #x= (4t - t^2 - 4)# m then?
**The question has multiple answers**.
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What is the projection of #<2,7,1 ># onto #<3,-5,7 >#?
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Question #f4e38
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Question #6e7c7
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Should I memorize all these unit conversions to solve simple problems ?!
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A truck pulls boxes up an incline plane. The truck can exert a maximum force of #3,500 N#. If the plane's incline is #(3 pi )/8 # and the coefficient of friction is #9/4 #, what is the maximum mass that can be pulled up at one time?
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The earth surface or a point at infinity from the earth can be chosen as zero reference level of? (a) Electric P.E. (b) Kinetic Energy (c) Gravitational P.E. (d) All of the above.
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An object, previously at rest, slides #15 m# down a ramp, with an incline of #pi/3 #, and then slides horizontally on the floor for another #10 m#. If the ramp and floor are made of the same material, what is the material's kinetic friction coefficient?
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Question #d3038
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An object with a mass of #6 kg# is pushed along a linear path with a kinetic friction coefficient of #u_k(x)= 1+5cotx #. How much work would it take to move the object over #x in [(11pi)/12, (7pi)/8]#, where x is in meters?
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If a wave has a frequency of 4 Hz and a speed of 24 m/s, which is its wavelength?
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A ball with a mass of #6 kg # and velocity of #4 m/s# collides with a second ball with a mass of #3 kg# and velocity of #- 2 m/s#. If #75%# of the kinetic energy is lost, what are the final velocities of the balls?
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An object with a mass of #4 kg# is pushed along a linear path with a kinetic friction coefficient of #u_k(x)= 5+tanx #. How much work would it take to move the object over #x in [(pi)/12, (pi)/4]#, where x is in meters?
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A 0.50 kg football is thrown with a velocity of 15 m/s to the right. A stationary receiver catches the ball and brings it to rest in 0.020 s. What is the force exerted on the receiver?
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Question #e6fe4
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Question #23213
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A canoe in a still lake is floating North at #5 m/s#. An object with a mass of #20 kg# is thrown East at #1/4 m/s#. If the mass of the canoe was #200 kg # before the object was thrown, what is the new speed and direction of the canoe?
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An object with a mass of #12 kg# is lying still on a surface and is compressing a horizontal spring by #1/3 m#. If the spring's constant is #6 (kg)/s^2#, what is the minimum value of the surface's coefficient of static friction?
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A 1.0 kg object moving at 10 m/s 30° N of E collides centrally with a 2.0 kg object moving at 5 m/s 30° S of W. If the collision is inelastic, what is the velocity of the combined objects after collision?
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Due to friction ,the system as shown in the diagram remains motionless.
Calculate the static coefficient of friction ?
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What is the moment of inertia of the earth?
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Question #50cae
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The normal reaction is always equal to?
(A) Weight (B) Tension (C) Both (D) None of these
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What is the average speed of an object that is moving at #18 m/s# at #t=0# and accelerates at a rate of #a(t) =t-8# on #t in [1,4]#?
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Help! How do you draw the FBD's for the following objects?
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An object of mass 16 kg is held in place by an applied force F and a pulley system as shown in the figure. Find the tension T4. Hint draw a free body diagram for the top pulley and the bottom pulley?
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A proton of mass m undergoes a head on collision with a stationary atom of mass 16m. If the initial speed of the proton is 470 m/s, find the speed of the proton after the collision?
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An object with a mass of #5 kg# is on a plane with an incline of #pi/8 #. If the object is being pushed up the plane with # 4 N # of force, what is the net force on the object?
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An object with a mass of #6 kg# is pushed along a linear path with a kinetic friction coefficient of #u_k(x)= 2+cscx #. How much work would it take to move the object over #x in [pi/12, (5pi)/6]#, where x is in meters?
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A ball with a mass of #150 g# is projected vertically by a spring loaded contraption. The spring in the contraption has a spring constant of #24 (kg)/s^2# and was compressed by #4/3 m# when the ball was released. How high will the ball go?
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What is work energy theorem?
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A box with an initial speed of #5 m/s# is moving up a ramp. The ramp has a kinetic friction coefficient of #5/4 # and an incline of #(3 pi )/4 #. How far along the ramp will the box go?
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The acceleration of a sled is #2"m"//"s"^2#. What is the acceleration of the sled if we triple the net force and halve the mass?
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A wrench with a length of #20 cm# is used to unscrew a #5/2 cm# bolt. If a torque of #12 Nm# is needed to overcome the friction keeping the bolt in place, what is the minimum torque that must be applied to the wrench to unscrew the bolt?
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A ball with a mass of #2 kg # and velocity of #8 m/s# collides with a second ball with a mass of #4 kg# and velocity of #- 1 m/s#. If #15%# of the kinetic energy is lost, what are the final velocities of the balls?
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A #1"kg"# stone is tied to a #0.5"m"# string and swung in a vertical circle. What is the tension in the string at the bottom of the loop?
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An object with a mass of #8 kg# is on a plane with an incline of # - pi/12 #. If it takes #8 N# to start pushing the object down the plane and #2 N# to keep pushing it, what are the coefficients of static and kinetic friction?
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An object has a mass of 100 kg on the moon. What is the force of gravity acting on the object on the moon?
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If an object has a mass of 20 kg, what is the force of gravity acting on it on earth?
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A block has a volume of #0.07# #m^3# and a density of #3,500# #kg##/##m^3#. What's the force of gravity acting on the block (and weight) in the air?
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What is an example of a combination of capacitors practice problem?
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An object, previously at rest, slides #4 m# down a ramp, with an incline of #pi/3 #, and then slides horizontally on the floor for another #9 m#. If the ramp and floor are made of the same material, what is the material's kinetic friction coefficient?
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Two charges of # -6 C # and # -3 C# are positioned on a line at points # -5 # and # 8 #, respectively. What is the net force on a charge of # 4 C# at # 2 #?
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A wrench with a length of #20 cm# is used to unscrew a #3/2 cm# bolt. If a torque of #8 Nm# is needed to overcome the friction keeping the bolt in place, what is the minimum torque that must be applied to the wrench to unscrew the bolt?
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An object with a mass of #5 kg# is on a plane with an incline of #pi/8 #. If the object is being pushed up the plane with # 8 N # of force, what is the net force on the object?
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An object with a mass of #24 kg# is on a ramp at an incline of #pi/12 #. If the object is being pushed up the ramp with a force of # 6 N#, what is the minimum coefficient of static friction needed for the object to remain put?
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A ball with a mass of #12 kg# moving at #8 m/s# hits a still ball with a mass of #15 kg#. If the first ball stops moving, how fast is the second ball moving? How much kinetic energy was lost as heat in the collision?
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What is the difference between a scalar, a vector, and a unit vector? Can we take the product of two vectors?
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Two objects have masses of #5 MG# and #7 MG#. How much does the gravitational potential energy between the objects change if the distance between them changes from #90 m# to #2000 m#?
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A model train with a mass of #2 kg# is moving along a track at #6 (cm)/s#. If the curvature of the track changes from a radius of #3 cm# to #8 cm#, by how much must the centripetal force applied by the tracks change?
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Why are satellite dishes for radio waves very large, and dishes for microwaves much smaller?
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What is the difference between center of gravity and center of mass?
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Assume that a 15-kg ball moving at 8 m/s strikes a wall perpendicularly and rebounds elastically at the speed. What is the amount of impulse given to the wall?
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A ball with a mass of #1 kg# moving at #9 m/s# hits a still ball with a mass of #9 kg#. If the first ball stops moving, how fast is the second ball moving? How much kinetic energy was lost as heat in the collision?
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What is polarized light?
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Whats the difference between a 3/4 and 4/4 size cello?
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What doe 4/4-1/4 mean when buying a cello?
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Violins, violas, cellos, and double basses all have how many strings?
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Does the bass or cello have lower notes?
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What are the cello letter names on the strings?
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What is the lowest note a cello can play?
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What is that big bass instrument that stands on the floor that looks like a giant violin called?
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What do you call a person who plays the cello?
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What is the difference between a cello OUTFIT and a cello?
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What does "cello" mean?
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Who is Yo-Yo Ma?
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Two particles move in a straight line together from rest, find the velocity at time = #t#?
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How do you convert violin/viola music to cello music?
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How do you tune a cello?
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What is a famous cello piece?
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Is piano part of orchestra?
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What do you need to learn cello?
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What are double stops on the cello?
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What clef does the cello read?
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How many strings does a cello have?
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The rate of rotation of a solid disk with a radius of #8 m# and mass of #2 kg# constantly changes from #2 Hz# to #8 Hz#. If the change in rotational frequency occurs over #12 s#, what torque was applied to the disk?
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What is the work done in lifting a 500-N barbell 2.2 m above the floor?
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A closed organ pipe is 25 cm long. The velocity of sound in air is 330 ms^-1. How do you calculate the frequency of the fundamental vibratory mode?
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