IX STD SCIENCE QUIZ CUM EXAMINATION 2021

The total length of the path traversed by an object is called

• displacement

• velocity

• distance travelled

• none of these

The area under velocity-time graph gives

• acceleration

• displacement

• speed

• force

If a body covers unequal distance in equal equal intervals, then it is said have

• uniform motion

• non-uniform motion

• uniform circular motion

• none of these

The distance and displacement of the object when it is subjected to circular motion and reaching the diametrically opposite end are respectively ( R being the radius of circular path)

• 2 $\pi$  R  & 2R

• 2R & 2 $\pi$  R

• R &  $\pi$  R

•  $\pi$  R & 2R

Acceleration is a vector quantity, true or false?

• true

• false

Pick the odd one that does not belong to the group

• acceleration

• retardation

• deceleration

• negative acceleration

What does the graph above represents?

• stationary object

• object moving with uniform velocity

• Object moving with uniform acceleration

• none of these

Choose the correct statement

• The magnitude of average velocity is always greater than the speed of the particle

• The magnitude of average velocity is always equal to magnitude of average speed

• The Magnitude of average speed is always less than average speed

• The magnitude of average velocity is always less than or equal to average speed.

A freely falling body is an example for

• One dimensional motion

• Two dimensional motion

• Three dimensional motion

• Curvilinear motion

The velocity of an object at any particular instant of time is called

• average velocity

• uniform velocity

• constant velocity

• instantaneous velocity