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A boy stands at the top of a 160m vertical cliff and throws a stone upwards with a speed of 20m/s. (a) Find the time taken for the stone to reach the bottom of the cliff. (b) T seconds after the first stone, a second stone is thrown by the boy towards the ground with speed 40 m/s. Assuming that the two stones hit the ground at the same time, calculate T. (c) Find velocities of the stones when they hit the ground. (d) When the boy throws the second stone, is the first stone located above or below the hight of the cliff?

A boy stands at the top of a 160m vertical cliff and throws a stone upwards with a speed of 20m/s. (a) Find the time taken for the stone to reach the bottom of the cliff. (b) T seconds after the first stone, a second stone is thrown by the boy towards the ground with speed 40 m/s. Assuming that the two stones hit the ground at the same time, calculate T. (c) Find velocities of the stones when they hit the ground. (d) When the boy throws the second stone, is the first stone located above or below the hight of the cliff?

Grade:12th pass

1 Answers

Saurabh Koranglekar
askIITians Faculty 10335 Points
5 years ago
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