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A stone is released from the top of a tower of height 19.6 m. Calculate its final velocity.


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A stone is thrown vertically upward with an initial velocity of 40 m/s. Taking g = 10 m/s2, find maximum height reached by the stone. What is the net displacement and total distance covered by the stone?


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A stone is allowed to fall from the top of a tower 100 m high and at the same time another stone is projected vertically upwards from the ground with a velocity of 25 m/s. Find when and where the two stones meet?


Suppose the two stones meet at a height x from the ground, after time t from the start.


Suppose the two stones meet at a height x from the ground, after time

Hence, the two stones meet after 4 s at a height of 20 m from the ground or 80 m from the top.

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Calculate the force of gravitation between the earth and the sun, given that the mass of the earth = 6 x 1024 kg and of the sun = 2 x 1030 kg. The average distance between the two is 1.5 x 1011 m.


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A ball thrown up vertically returns to the thrower after 6 s. Find:
(a) the velocity with which it was thrown up,
(b) the height, and
(c) its position after 4 s.


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