CBSE - Motion

1 Motion A boy throws a ball up and catches it when the ball falls back. In which part of the motion the ball is accelerating?
(1) During downward motion
(2) When the ball comes to rest
(3) During upward motion
(4) When the boy catches the ball

2 Motion A body is moving along a straight line at 20 ms^–1 undergoes an acceleration of 4 ms After 2 s, its speed will be-

(1)  8 ms^–1
(2)  12 ms^–1
(3)  16 ms^–1
(4)  28 ms^–1

3 Motion The slope of the distance-time graph is:

(1) Distance
(2) acceleration
(3) Speed
(4) Displacement

4 Motion A stone is dropped from the top of a tower. Its velocity after it has fallen 20 m is (take g = 10m/s²)
(1) –10 m/s (2) 10 m/s (3) – 20 m/s (4) 20 m/s

5 Motion 40 A body starts falling from height 'h' and travels distance h/2 during the last second of motion. The time of travel (in sec.) is-
(1) √ 2 -1
(2) 2 + √2
(3) √2+ √3
(4) √3 +2

6 Motion The velocity-time graph of a body moving in a straight line is shown in figure. The displacement and distance travelled by the body in 6 second are respectively-

(1)  8m , 16m
(2)  16m, 8m
(3)  16m, 16m
(4)  8m, 8m

7 Motion The distance covered by the body between 30-40 seconds is

(1) 40m
(2) 50m
(3) 60m
(4) 20m

8 Motion A body is said to be in non-uniform motion if it travels
(1) Equal distance in unequal interval of time
(2) Equal distance in equal interval of time
(3) Unequal distance in unequal interval of time
(4) Unequal distance in equal interval of time

9 Motion The ratio of the heights from which two bodies are dropped is 3:5 respectively. The ratio of their final velocities is:
 (1) 9 : 25
 (2) √ 3 : √ 5
 (3) 5 : 3
 (4) √5 : √3

10 Motion For a body performing motion with uniform speed, the distance-time graph is:

(1) Straight line parallel to y-axis
(2) Straight line inclined to the time axis
(3) Straight line parallel to x-axis
(4) Curved line