Answers created by Joaquín M.

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• Question #a8f56
  
• Question #fa936
  
• Question #106f9
  
• You place a block of wood into a beaker of water and it floats. What can you say about the buoyant force on the block?
  
• An object with a mass of # 3 kg# is traveling in a circular path of a radius of #7 m#. If the object's angular velocity changes from # 3 Hz# to # 9 Hz# in #3 s#, what torque was applied to the object?
  
• The force applied against a moving object travelling on a linear path is given by #F(x)= sinx + 2#. How much work would it take to move the object over #x in [ 0,pi/3] #?
  
• An object with a mass of #2 kg# is traveling at #14 m/s#. If the object is accelerated by a force of #f(x) = x+xe^x # over #x in [0, 9]#, where x is in meters, what is the impulse at #x = 8#?
  
• An object, previously at rest, slides #6 m# down a ramp, with an incline of #(3pi)/8 #, 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 #25f42
  
• A baseball is thrown vertically with a velocity of 13 m/s. How high does it go? At what two times is the ball 5 m above the ground?
  
• The force applied on a moving object with a mass of #1 kg # on a linear path is given by #F(x)=2x +3#. How much work would it take to move the object over #x in [1,3] #?
  
• A projectile is shot from the ground at a velocity of #4 m/s# at an angle of #pi/6#. How long will it take for the projectile to land?
  
• A ball with a mass of #2 kg# moving at #14 m/s# hits a still ball with a mass of #21 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?
  
• Question #f66fb
  
• Question #0864e
  
• If a #2 kg# object is constantly accelerated from #0m/s# to #16 m/s# over 6 s, how much power musy be applied at #t=1 #?
  
• It took a 500.0-newton ballerina a force of 250 joules to lift herself upward through the air. How high did she jump?