Two identical blocks are pushed up frictionless inclines as shown. Consider the

Question

Two identical blocks are pushed up frictionless inclines as shown. Consider the portion of the motion of block 1 during which it moves a distance Lj, and the portion of the motion of block 2 during which is moves a distance L2. Each block is displaced the same vertical distance Z. The hand pushes parallel to the incline with the same magnitude of force F Hand rightarrow B in both cases. Block 1 moves with constant speed. The absolute value of the work done by the hand on block 1 is the absolute value of the work done by the hand on block 2. greater than less than equal to There is insufficient information to determine. The absolute value of the work done by the gravitational force on block 1 is the absolute value of the work done by the gravitational force on block 2. greater than less than equal to There is insufficient information to determine. The speed of block 2 . increases decreases remains the same There is insufficient information to determine.

Explanation / Answer

4. The absolute value of the work done by the hand on block 1 is equal to that on block 2, becacuse two blocks are at same height and work done by hand is mgh.

5. The absolute value of work done by the gravitational force on block 1 is greater than that of 2, because angle of inclination of incline 1 is greater than that of 2.

6. the speed of block 2 increases, because of less angle of inclination.

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