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A wrench with a length of #24 cm# is being used to unscrew a #3 cm# bolt. If a torque of #7 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?

Question #b567b

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?

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?

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?

A force field is described by #<F_x,F_y,F_z> = < xy , xyx, 2y zx > #. Is this force field conservative?

What is the minimum speed needed for a 2 kg mass to stay in motion in a vertical circle of radius 1.45 m?

How do you solve #8h ^ { 2}  8h + 1= 0#?

A projectile is shot at an angle of #pi/3 # and a velocity of # 6 m/s#. How far away will the projectile land?

How do you integrate #int (x^2  8x + 44) / ((x + 2) (x  2)^2)# using partial fractions?

How do you tune a cello?

A ball with a mass of #7 kg # and velocity of #4 m/s# collides with a second ball with a mass of #2 kg# and velocity of # 6 m/s#. If #15%# of the kinetic energy is lost, what are the final velocities of the balls?

A hat weighing #5"N"# is placed on a hook #1.5"m"# above the ground. What is the potential energy of the hat?

A wrench with a length of #42 cm# is being used to unscrew a #7/2 cm# bolt. If a torque of #32 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?

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?

A rock is dropped from rest from the roof of a building 100 m high. What is the velocity of the rock at the moment it reaches the ground? How long does it take to hit the ground?

A block weighing #14 kg# is on a plane with an incline of #pi/12# and friction coefficient of #1/5#. How much force, if any, is necessary to keep the block from sliding down?

Two charges of # 9 C # and # 2 C# are positioned on a line at points # 4 # and # 4 #, respectively. What is the net force on a charge of # 3 C# at # 2 #?

Question #a9e31

How do you tell #"S"_"N"1# and #"S"_"N"2# reactions apart?

What is the angular velocity in radians per second of a flywheel that spins 4820 revolutions per minute?

How does the smoothness of a surface affect the size of friction?

How much work does it take to raise a #6 kg # weight #21 m #?

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?

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?

If I throw an 18g dart from a height of 70" to a target that is 77" away & 68" high, and it takes .24 seconds to get there. Approx how heavy a dart of similar design would be required to hit the target if it's 3" further away using the same arm tempo?

An object with a mass of #18 kg# is on a plane with an incline of # (5 pi)/12 #. If it takes #9 N# to start pushing the object down the plane and #4 N# to keep pushing it, what are the coefficients of static and kinetic friction?

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?

How do you find the local max and min for #y=2x^3  5x^2  4x + 7#?

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?

An object, previously at rest, slides #7 m# down a ramp, with an incline of #(pi)/3 #, and then slides horizontally on the floor for another #3 m#. If the ramp and floor are made of the same material, what is the material's kinetic friction coefficient?

Question #2e2cc

What are the main intermolecular forces found in a liquid sample of #CBr_4#?

An object with a mass of # 15 kg# is on a ramp at an incline of #pi/8 #. If the object is being pushed up the ramp with a force of # 7 N#, what is the minimum coefficient of static friction needed for the object to remain put?

How many mols are in 8.00 g #BeF_2#?

How do you find the derivative of #root3((6x+7))#?

How much work does it take to push an object with a mass of #4 kg # up a #9 m # ramp, if the ramp has an incline of #(5pi)/12 # and a kinetic friction coefficient of # 8 #?

What are the advantages and disadvantages of mass spectroscopy?

A solid disk, spinning counterclockwise, has a mass of #6 kg# and a radius of #3 m#. If a point on the edge of the disk is moving at #5/2 m/s# in the direction perpendicular to the disk's radius, what is the disk's angular momentum and velocity?

Does a car accelerate when it goes around a corner at a constant speed?

A ball with a mass of #2 kg # and velocity of #2 m/s# collides with a second ball with a mass of #1 kg# and velocity of # 4 m/s#. If #20%# of the kinetic energy is lost, what are the final velocities of the balls?

A force field is described by #<F_x,F_y,F_z> = < x , z, y > #. Is this force field conservative?

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 #28 (kg)/s^2# and was compressed by #9/6 m# when the ball was released. How high will the ball go?

Question #bb8aa

A hockey player of mass 50kg runs at 20 m/s toward another player of 40kg, moving at 10 m/s. They collide. What are the final velocities of the players?

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?

A ball with a mass of #7 kg # and velocity of #2 m/s# collides with a second ball with a mass of #6 kg# and velocity of # 3 m/s#. If #75%# of the kinetic energy is lost, what are the final velocities of the balls?

An object with a mass of #8 kg# is pushed along a linear path with a kinetic friction coefficient of #u_k(x)= 5x^2x+1 #. How much work would it take to move the object over #x in [2, 3], where x is in meters?

Two charges of # 3 C # and # 7 C# are positioned on a line at points # 6 # and # 5 #, respectively. What is the net force on a charge of # 2 C# at # 2 #?

A container with a volume of #4 L# contains a gas with a temperature of #270^o K#. If the temperature of the gas changes to #420^o K# without any change in pressure, what must the container's new volume be?

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?

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?

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?

How does an NMR spectrometer work?

What torque would have to be applied to a rod with a length of #4 m# and a mass of #3 kg# to change its horizontal spin by a frequency of #5 Hz# over #1 s#?

Question #6e7c7

How do you name alkenes and alkynes?

How do you evaluate #intsin(2x)/sin(x)dx#?

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 #?

A projectile is shot at an angle of #pi/8 # and a velocity of # 10 m/s#. How far away will the projectile land?

A 0.1 g spider is suspended from a thread. What is the tension in the thread?

Question #8685a

Question #fee78

An object with a mass of # 3 kg# is traveling in a circular path of a radius of #2 m#. If the object's angular velocity changes from # 2 Hz# to # 16 Hz# in # 5 s#, what torque was applied to the object?

How much work would it take to push a # 1 kg # weight up a # 4 m # plane that is at an incline of # pi / 4 #?

An object with a mass of #110 g# is dropped into #750 mL# of water at #0^@C#. If the object cools by #70 ^@C# and the water warms by #5 ^@C#, what is the specific heat of the material that the object is made of?

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?

What is the cross product of #( 4 i  5 j + 2)# and #(i + j 7k)#?

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) =t8# on #t in [1,4]#?

An object with a mass of #5 kg# is revolving around a point at a distance of #2 m#. If the object is making revolutions at a frequency of #4 Hz#, what is the centripetal force acting on the object?

How do you integrate #int x^2e^x# from 0 to 1 by integration by parts method?

A #3.0*10^3# kg truck traveling at 20.0 m/s in a test laboratory collides into a wall and comes to rest in 0.10 s. What is the magnitude of the average force acting on the truck during the collision?

An object, previously at rest, slides #9 m# down a ramp, with an incline of #(pi)/3 #, and then slides horizontally on the floor for another #19 m#. If the ramp and floor are made of the same material, what is the material's kinetic friction coefficient?

Question #4b2cc

An object with a mass of #5 kg# is pushed along a linear path with a kinetic friction coefficient of #u_k(x)= x+xsinx #. How much work would it take to move the object over #x in [0, 8pi]#, where x is in meters?

A lamp hangs from the ceiling at a height of 2.9 m. If the lamp breaks and falls to the floor, what is its impact speed?

Question #4acab

What is the angle between #<1,8,6 ># and #< 6,3,0>#?

Question #3df20

A ball with a mass of #256 g# is projected vertically by a spring loaded contraption. The spring in the contraption has a spring constant of #36 (kg)/s^2# and was compressed by #12/4 m# when the ball was released. How high will the ball go?

A force field is described by #<F_x,F_y,F_z> = < x +y , 2zy, 2y z > #. Is this force field conservative?

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