NUMERICALS
1. The velocity acquired by a body moving with uniform acceleration is 12 m/s in 2s and 18 m/s in 4 s. Find the initial velocity of the body.
2. A stone is dropped freely in the river from a bridge. It takes 5 s to touch the water surface in tyhe river. Calculate
(a) the height of the bridge from the water level
(b) the distance covered by stone in the last second(g=9.8 m/s^2)
(Ans.(a) 122.5m (b)44.1 m)
3. A body is dropped under gravity from the top of a tower of height 78.4 m. Calculate
(a) time to reach the ground
(b) velocity with which it will strike the ground.
4. A body with an initial velocity of 18 km/h accelerates uniformly at the rate of 9cm/s^2 over a distance of 200 m. Calculate
(a) acceleration
(b) final velocity
5. A ball is thrown vertically upwards. It goes to a height of 19.6 m and then returns back to the ground. Find the
(a) initial velocity of the ball
(b) total time of journey
(c) final velocity of the ball when it strikes the ground.
1. The velocity acquired by a body moving with uniform acceleration is 12 m/s in 2s and 18 m/s in 4 s. Find the initial velocity of the body.
2. A stone is dropped freely in the river from a bridge. It takes 5 s to touch the water surface in tyhe river. Calculate
(a) the height of the bridge from the water level
(b) the distance covered by stone in the last second(g=9.8 m/s^2)
(Ans.(a) 122.5m (b)44.1 m)
3. A body is dropped under gravity from the top of a tower of height 78.4 m. Calculate
(a) time to reach the ground
(b) velocity with which it will strike the ground.
4. A body with an initial velocity of 18 km/h accelerates uniformly at the rate of 9cm/s^2 over a distance of 200 m. Calculate
(a) acceleration
(b) final velocity
5. A ball is thrown vertically upwards. It goes to a height of 19.6 m and then returns back to the ground. Find the
(a) initial velocity of the ball
(b) total time of journey
(c) final velocity of the ball when it strikes the ground.
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