1. A boy standing on top of a tower throws up a ball with a velocity u. The ball reach to foot of the tower with velocity 3u. The height of the tower is:
(a) 2u^2/g
(b) u^2/g
(c) 3u^2/g
(d) 4u^2/g
2. Two cars A and B starting from rest accelerate uniformly at the same rate. However, the car B travels for twice the time than A. The ratio of distance covered by the car A (x) and the car B
is:
(a) x = y
(b) x = 2y
(c) y = 3x
(d) y = 4x
3. A boy sitting a moving train moving at a constant velocity drops a stone from the window. To the boy, the path of stone will appear:
(a) parabola
(b) arc of circle
(c) straight line
(d) none of the above
Please give me the answers with correct explanations and as fast as possible.
(a) 2u^2/g
(b) u^2/g
(c) 3u^2/g
(d) 4u^2/g
2. Two cars A and B starting from rest accelerate uniformly at the same rate. However, the car B travels for twice the time than A. The ratio of distance covered by the car A (x) and the car B
is:(a) x = y
(b) x = 2y
(c) y = 3x
(d) y = 4x
3. A boy sitting a moving train moving at a constant velocity drops a stone from the window. To the boy, the path of stone will appear:
(a) parabola
(b) arc of circle
(c) straight line
(d) none of the above
Please give me the answers with correct explanations and as fast as possible.