Carts Moving Along Horizontal Surface-String Tension14 The six figures below sho

Question

Carts Moving Along Horizontal Surface-String Tension14 The six figures below show carts that are moving along horizontal surfaces at various speeds. The carts are the same size and shape but carry different loads, so their masses differ. All of the carts have a massless string attached, which passes over a frictionless massless pulley and is tied to a metal block that is hanging free. All of the metal blocks are identical. As the carts move to the right they pull the blocks up toward the horizontal surface, which is the top of the table. Rank these situations, from greatest to least, on the basis of the tension in the strings at the instant shown. That is, put first the situation where the string is under the greatest tension, and put last the situation where the string is under the least tension at that instant 30 m/s 40 m/s 60 m/s 90 g 80 g 40 g 60 m/s 30 m/s 30 m/s 30 g 80 g 30 g Least Greatest 1 Or, of these strings are under the same tension. Or, there is no tension in any of these strings Please carefully explain your reasoning How sure were you of your ranking? (circle one) Basically Guessed Sure Very Sure 2 4 10 14 D. Maloney Ranking Task Exercises in Physics: Student Edition 14

Explanation / Answer

Answer to first question:

All the cart are moving with different speed and are having different momentum owing to different masses but none of them are in accelerated motion, therefore the net force on them is zero.

As same identical block is connected ti all the six cart therefore the tension all the string would be identical and would be equal to the weight of the hanging block.

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