road on tire stand on you a great deal 0. Suppose that, while in a squatting pos

Question

road on tire stand on you a great deal 0. Suppose that, while in a squatting position, You force. You are applying a large force to the bat 2r feet, but no matter how strong you are, you to lift yourself off the ground. Use your :ade and motion to explain why this is not pcssibie hands, and then you pull up on your feet with Stand the bottoms of you of force Multiple-Choice Questions 21. 1 A block has acceleration a when pulled by a s a string. If tw identical blocks are glued together and pulled with twice original force, their acceleration will be . (14)a B. (1/2) . D. 2a E. 4a 22. I A 5.0 kg block has an acceleration of 0.20 m/s" when a force exerted on it. A second block has an acceleration of 0.10 m/s when subject to the same force. What is the mass of the second block? A. 10 kg B. 5.0 kg C. 2.5 kg D. 7.5 kg 23. I Tennis balls experience a large drag force. A tennis ball is hit so that it goes straight up and then comes back down. The direction of the drag force is A. Always up. C. Always down. B. Up and then down. D. Down and then up. 24. I A group of students is making model cars that w t will be pro- pelled b constant thrust force. The cars are light-most constant mrodel rocket engines. These engines provide a ne comes from the rocket engine-and friction and dragra small. As the engine fires, it uses fuel, so 1 the end of the run than rag are very uel, so it is much lighter engine

Explanation / Answer

here,

22)

mass of block 1 , m1 = 5 kg

accelration of block 1 , a1 = 0.2 m/s^2

accelration of block 2 , a2 = 0.1 m/s^2

let the mass of seccond block be m2

using Newton's seccond law

F = m1 * a1 = m2 * a2

5 * 0.2 = 0.1 * m2

m2 = 10 10 kg

the mass of seccond block is A) 10 kg

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