Unit of acceleration is

(a)

ms^-1

(b)

ms^-2

(c)

ms

(d)

ms²

The force responsible for drying of clothes in a washing machine is

(a)

Centripetal force

(b)

Centrifugal force

(c)

Gravitational force

(d)

Electrostatic force

The area under velocity time graph represents

(a)

Velocity of the moving object

(b)

Displacement covered by the moving object

(c)

Speed of the moving object

In a 100 m race, the winner takes 10 s to reach the finishing point. The average speed of the winner is ___________ ms^-1.

(a)

5

(b)

10

(c)

20

(d)

40

Speed is never ______

(a)

fraction

(b)

negative

(c)

zero

(d)

positive

If velocity of a body decreases in equal intervals of time it is termed ______

(a)

uniform acceleration

(b)

non-uniform acceleration

(c)

negative acceleration

(d)

positive acceleration

The velocity time graph is parallel to X-axis it shows _______.

(a)

uniform velocity of an object

(b)

non-uniform velocity

(c)

stationary position of an object

(d)

acceleration motion of an object

Area under a velocity time graph gives ______

(a)

time taken by an object

(b)

distance travelled by an object

(c)

acceleration

(d)

retardation

A body moving along a circular path has _______

(a)

constant speed

(b)

constant velocity

(c)

no radial acceleration

(d)

no tangential velocity

In which direction of the motion of the particles does centripetal force act?

(a)

parallel

(b)

radial

(c)

tangential

(d)

perpendicular