X PHYSICS
UNIT- III
KINEMATICS
1. A body falls from a height of 19.6 m. Its final velocity is __________________.
2. When a body goes up acceleration is _____________.
3. For a freely falling body acceleration is = _____________.
4. time for which a body remains in the air is called _____________.
5. Maximum height reached by a body when it is thrown up with an initial velocity u is _____________.
6. Time taken by a body thrown up to reach the maximum height is called the __________.
7. The taken by a freely falling body to touch the ground is called the _____________.
8. The time of ascent is directly proportional to the initial _____________.
9. Time of ascent is equal to the time of _____________ in the case of bodies under gravity. 10. The upward velocity at any point in its flight is the _____________ as its downward velocity at that point.
11. In the case of a freely falling body the final velocity (V) is _____________.
12. In case of a body thrown upwards the initial velocity (u) is _____________.
13. The upward velocity at nay point in its flight is the same as its ________ at the point.
14. If a freely falling body takes 1 sec to reach the ground the height from which it is falling is _____
15. The relation between initial velocity u, final velocity V and acceleration a, is _______.
16. The distance traveled by a freely falling stone in its 3rd second of its travel is _________.
17. The ratio of the distance traveled by a freely falling body in eth first, second and third second of its fall are _____________.
18. The ratio of the displacement to a distance is always _____________.
19. When a body moves towards the earth acceleration due to gravity is taken as ________.
20. When a body is projected upwards the acceleration due to gravity is taken as ________.
21. When a body is dropped from a height h, the velocity of the body on reaching the earth is ____.
22. Time of ascent is directly proportional to _____________.
23. For a body moving under the influence of gravity, time of ascent is equal to _________
24. A ball is thrown up and attains a maximum height of 80m. its initial speed is __________.
. On a planet a body falls through a height of 4x2 meters in x seconds. The acceleration due to gravity on the planet is _____________.
26. An object covers distance in direct proportion to the square of the time elapsed. The acceleration is _____________.
27. A stone is projected up with a velocity ‘u’ and at the same time another stone is dropped from a height ‘2u’. The time required for then to meet in air is _____________.
28. The value of the acceleration due to gravity ‘g’ is nearly _____________.
29. Time of ascent is directly proportional to _____________.
30. A body is thrown vertically with an initial velocity 20 m/sec. The maximum height reached is _____________.
X PHYSICS
UNIT- III
KINEMATICS Key
(1) 19.6 m/sec (2) –g (3) 0 (4) time of flight (5) h = u2 / 2g (6) time of ascent (7) time of descent (8) velocity (9) decent (10) same (11) v(2gh) (12) v(2gh) (13) downward velocity (14) 4.9 meters (15) v2 – u2 = 2as (16) 24.5m (17) 1 : 4 : 9 (18) less than (19) positive (2gh) (22) initial velocity (23) time of descent (u/g) (24) 40 m/s (25) 8 m/sec2 (26) constant (27) 2 seconds (28) 980 cm-2 (29) initial; velocity (30) 20 m.
