1. A rocket is fired vertically from the ground. It moves upwards with constant acceleration 10ms-2 for 30 seconds after which the fuel is consumed. After what time form the instant of firing the rocket will attain the maximum height? take
g = 10 ms-2
2. A body is thrown with speed 20m/s vertically upward , It will return to thrower’s hand after a time of:
(assume g=10m/s2)
3. A body is dropped from the top of a tower and falls freely. The distance covered by it after n seconds is directly proportional to
4. From the top of a tower, a particle is thrown vertically downwards with a velocity of 10m/s . The ratio of the distances covered by it in the 3rd and 2nd seconds of its motion is (take g = 10 m/s2 )
5. A ball is dropped from the top of tower 100m high. Simultaneously another ball is thrown upward with a sped of 50 ms-1. after what time do they cross each other
6. A ball dropped from a height h reaches the ground in time T. what is its height at time T/2
7. A ball is dropped from the top of the tower of height h. It covers a distance of h/2 in the last second of its motion.How long does the ball remain in air.
8. Two bodies A and B of different masses ma and mb are dropped from two different heights a and b respectively. The ratio of the times taken by two to drop through this distance is:
9. A body is dropped from the top of a tower and falls freely, the distance covered in the nth second is proportional to
10. An object is thrown vertically upward than which of these statement is correct.