Question

In the lab setup above, block 1 is being pulled across a smooth surface by a light string connected across a pulley to a falling block 2. The pulley has negligible mass and friction. Students measure the mass of each block, the distance from A to B , and the speeds of the block on the surface at points A and B . Which of the following hypotheses can be tested with this setupAs block 1 moves from point A to point B, the work done by the tension on block 1 is equal to the kinetic energy of block 1 at point B.As block 1 moves from point A to point B, the work done by the tension on block 1 is equal to the kinetic energy of the two-block system when block 1 is at point B.As block 1 moves from point A to point B , the work done by gravity on block 2 is equal to the kinetic energy of block 1 at point B.As block 1 moves from point A to point B, the work done by gravity on block 2 is equal to the change in the kinetic energy of the two-block system.As block 1 moves from point A to point B, the work done by the tension on block 2 is equal to the kinetic energy of block 2 when block I has reached point B.

Answer 1

Answer:

As block 1 moves from point A to point B, the work done by gravity on block 2 is equal to the change in the kinetic energy of the two-block system.

Explanation:

As block 2 goes down , work is done by gravity on block 2 . This is converted

into kinetic energy of block 1 and block 2 . Work done by gravity is mgh which can be measured easily . kinetic energy of both the blocks can also be measured.