1) Suppose you place a ball in the middle of a wagon and then suddenly accelerat

Question

1) Suppose you place a ball in the middle of a wagon and then suddenly accelerate the wagon forward. Which way will the ball move relative to the ground? [1 point) 2) Explain your answer in question (1) on the basis of Newton's first law of motion.[2 points] 3) Which masses contribute to the total mass, M, of the system in Figure 1? [1 point] 4) Explain how you would keep the total mass of the system constant while performing experiment to demonstrate Newton's second law. [Hint: look at the procedure section for Newton's second law] [ 2 points] 5) In this lab we plot a graph of Force vs. acceleration with Force along Y-axis. What does the slope of this graph represent? What would be the units of the slope? [1+1-2 points] 6) The weight of a hanging mass of 50 gm will be (g 9.8m/s) [1 point] 7) If an object of weight 50 N is dropped, the force of impact will be [1 point] a) 50N from. b) less than 50N c) more than 50N d) depends on how high it was dropped

Explanation / Answer

1) The ball will move backwards relative to the wagon's ground.

2) The ball will have the inertia of rest. So as there will be a movement, the inertia of rest will tend to resist the motion of the ball and hence it will move backwards.

3) 4) Requires experiment picture and data.

5) F=ma. So the slope will give mass and it's unit will be. "Kg".

6) W=mg= 0.05*9.8 = 0.49 N

7) d) The force of impact will depend upon the time of contact of the ball with the ground and the change in momentum. Hence will depend upon the height from which it was dropped.

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