A block is pushed at a constant speed up a ramp from point A to point B. The for

Question

A block is pushed at a constant speed up a ramp from point A to point B. The force on the block by the hand is directed parallel to the ramp surface. There is friction between the block and the ramp. The distance between points A and B is 1 meter.

a) The kinetic energy of the block at point B ___



A.is greater than the kinetic energy of the block at point A.
B. is less than the kinetic energy of the block at point A.
C.is equal to the kinetic energy of the block at point A.
Dcannot be compared to the kinetic energy of the block at point A unless we know the height difference between A and B.

Explanation / Answer

From work energy theorem, As the speed of the ball will be lower at B due to frictional forces. Hence Kinetic energy at B will be lower than A. Option - B is correct !!!

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