CBSE - Motion

1 Motion If the velocity-time graph of an object is not a straight line , then its acceleration is:
(1) Variable
(2) Positive
(3) Zero
(4) Negative

2 Motion The distance travelled by the body between 0 to 20 seconds?

(1) 260m
(2) 160m
(3) 300m
(4) 60m

3 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

4 Motion A car accelerates uniformly from 18 km/h to 36km/ h in 5 s. The acceleration in ms^–2 is -

(1)  1
(2)  2
(3)  3
(4)  4

5 Motion If car A is at 40 km/h and car B is at 10 km/h in the opposite direction, what is the velocity of the car A relative to the car B?
(1) 20 km/h
(2) 50 km/h
(3) 10 km/h
(4) 40 km/h

6 Motion The brakes applied to a car produce a negative acceleration of 6ms^–2  If the car stops after 2 seconds, the initial velocity of the car is -

(1)  6 ms^–1
(2)  12 ms^–1
(3)  24 ms^–1
(4)  Zero

7 Motion A body starts from rest at time t = 0, the acceleration time graph is shown in figure. The maximum velocity attained by the body will be :

(1) 110 m/s
(2) 55 m/s
(3) 650 m/s
(4) 550 m/s

8 Motion  A body freely falling from rest has a velocity v after it falls through a height h. The distance it has to fall further for its velocity to become double is -

(1)  3 h
(2)  6 h
(3)  8 h
(4)  10 h

9 Motion 

In a circular path of radius 1 m, a mass of  2 kg moves with a constant speed of 10 ms^–1 .The angular speed in radian/sec. is -
(1) 5
(2) 10
(3) 15
(4) 20

10 Motion Area between speed-time graph and time axis gives-

(1)  Distance
(2)  Velocity
(3)  Speed
(4)  None of these