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The impulse-momentum relationship is a direct result of ______________

A fire fighter of mass 80 kg slides down a vertical pole with an acceleration of 4 m/s2 . What is the magnitude of friction force acting on the fire fighter? 

The unit kilowatt-hour is a unit of [Answer1] and Joules is a unit of [Answer2]

A heavy truck and a small car roll down a hill at the same speed and need to stop in the same amount of time. Compared with the force to stop the car, the force needed to stop the truck is _________  

Which phenotypic sex (M = male, F = female) would be observed for each individual? (assume all other chromosomes are normal.)

A car races on a circular track of radius 400 m , and the time to complete a lap is 40 s. What is the average speed around the track? 

Fill in two blanks. A ball is thrown straight up with enough speed so that it is in the air for several seconds. The air resistance acting on the ball is negligible.  The velocity of the ball when it reaches its highest point is [Answer1] m/s and the acceleration of the ball when it reaches its highest point is [Answer2] m/s2.    

A cat starts from rest and run with an acceleration of 5 m/s2 along a straight line . How far does it go in 4 seconds?

When you push a crate across a level floor at constant velocity, friction between the crate and the floor is __________  

A child on a sled is sliding down some snow covered hills starting from rest at location A. In the picture three different locations are marked with the letters A, B, and C. Rank from highest to lowest the kinetic energy of the child.