Laws Of Motion

Physics
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Assertion

When a bus starts suddenly, a person standing in it falls backwards.

Reason

It is due to inertia of rest.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C
Assertion is correct but Reason is incorrect
D
Assertion is incorrect but Reason is correct
Easy
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Impulse is equal to

A
momentum
B
change in momentum
C
rate of change of momentum
D
rate of change of force
Easy
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Newton's second law of motion gives

A
magnitude of force
B
velocity of the object
C
concept of inertia
D
all the above
Easy
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Which of the following is the most significant law of motion given by Newton?

A
First law of motion
B
Second law of motion
C
Third law of motion
D
Zeroth law of motion
Easy
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When an athlete takes part in a long jump he runs for a while and then jumps. This is because:

A
inertia of motion helps him to take a longer jump.
B
running for a time makes him alert.
C
it helps him to focus on the point of jump.
D
he can apply more force for the jump after running.
Easy
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Which of following Newton's laws reveals the underlying symmetry in the forces that occur in nature?

A
First law
B
Second law
C
Third law
D
Law of gravitation
Easy
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When a moving body is suddenly stopped, then:

A
Frictional force increases.
B
Friction force remains same as it was while the car was moving.
C
Friction force reduces but has a non zero value.
D
Frictional force reduces to zero as it is a self adjusting force.
Easy
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In which of the following cases the net force is not equal to zero?

A
A kite skillfully held stationary in the sky.
B
A ball falling freely from a height.
C
A helicopter hovering above the ground.
D
A cork floating on the surface of water.
Easy
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