Laws of Motion Test

Result

Laws of Motion Test - 3

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Question 1
4 / -1

The term inertia was first used by

A
Newton

B
Galileo

C
Aristotle

D
Kepler

Solution

The term inertia was first used by Galileo.
Question 2
4 / -1

Inertia is that property of a body by virtue of which the body is

A
unable to change by itself the state of rest.

B
unable to change by itself the state of uniform motion.

C
unable to change by itself the direction of motion.

D
unable to change by itself the state of rest or of uniform motion.

Solution

Inertia means resistance to change. It is the property of the body by virtue of which it cannot change by itself its state of rest or of uniform motion.
Question 3
4 / -1

A passenger getting down from a moving bus, falls in the direction of the motion of the bus, This is an example for

A
second law of motion

B
third law of motion

C
inertia of rest

D
Inertia of motion

Solution

A passenger getting down from a moving bus falls in the direction of the motion of the bus. This is because his feet come to rest on touching the ground an the remaining body continues to move due to inertia of motion.
Question 4
4 / -1

A ball is travelling with uniform translatory motion, This means that

A
it is at rest.

B
the path can be a straight line or circular and the ball travels with uniform speed.

C
all parts of the hall have the same velocity (magnitude and direction) and the velocity is constant.

D
the centre of the hall moves with constant velocity and the ball spins about its centre uniformly.

Solution

In uniform translatory motion, all parts of the ball have the same velocity in magnitude and direction and this velocity is constant.
Question 5
4 / -1

When a speeding bus stops suddenly, passengers are thrown forward from their seats because

A
the back of seat suddenly pushes the passengers forward

B
inertia of rest stops the bus and takes the body forward

C
upper part of the body continues to be in the state of motion whereas the lower part of the body in contact with seat remains at rest

D
upper part of the body come to rest whereas the lower part of the body in contact with seat begins to move

Solution

When the speeding bus stops suddenly, the lower part of the passengers’s body in contact with the seat remains at rest whereas the upper part of the body of the passengers continues to be in state of motion due to inertia. Hence, the passengers are thrown forward.