CBSE - Motion

1 Motion What is true about scalar quantities ?

(1)  Scalars quantities have direction also.
(2)  Scalars can be added arithmetically.
(3)  There are special laws for scalar addition.
(4)  Scalars have special method to represent.

2 Motion 

In the distance-time graph of a cyclist, what is happening between B-C and C-D?

(1) B-C: cyclist is coming back to where he started, C-D: cyclist is stationary.
(2) B-C: cyclist is stationary, C-D: cyclist is accelerating.
(3) cyclist is stationary, C-D- speed is increasing
(4) B-C: cyclist is stationary, C-D: cyclist is coming back to where he started.

3 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

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

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

5 Motion If car A is at 80 km/h and car B is at 60 km/h in the same direction, what is the velocity of thecar A relative to the car B?
(1) 40 km/h
(2) 20 km/h
(3) 10 km/h
(4) 30 km/h

6 Motion In case of a moving body-

(1)  Displacement > Distance
(2)  Displacement < Distance
(3)  Displacement ³ Distance
(4)  Displacement £ Distance

7 Motion At the top of its path a projectile has
(1) no acceleration
(2) acceleration in the upward direction
(3) acceleration in the downward direction
(4) acceleration in the horizontal direction

8 Motion The velocity time graph of two bodie s A and B traveling along the +x direction are given in
the figure . Which body has a greater acceleration?

(1) Body A has a greater acceleration
(2) Body B has a greater acceleration
(3) Both A and B have same acceleration
(4) Acceleration cannot be predicted from the given graph

9 Motion Which sentence best describes the athlete whose distance-time graph is shown below?

(1) The athlete ran forward for 3 seconds, and then he ran backward for 3 more seconds.
(2) The athlete ran forward for 3 seconds, and then he stood still for 3 more seconds.
(3) The athlete ran forward for 3 seconds, and then he ran forward for 3 more seconds but with a lower speed.
(4) The athlete ran forward for 3 seconds, and then he moved forward for 3 more seconds with a greater speed.

10 Motion The area enclosed by velocity-time graph and the time axis will be equal to the magnitude of
(1) displacement
(2) speed
(3) acceleration
(4) distance