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Question (1)

QN0034985

We can derive Newton's

(A)
second and third laws from the first law
(B)
first and second laws from the third law
(C)
third and first laws from the second law
(D)
All the three laws are independent of each other

Correct Answer: C

Explanation:

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Question (2)

QN0034986

Swimming is possible on account of

(A)
first law of motion
(B)
second law of motion
(C)
third law of motion
(D)
newton's law of gravitation

Correct Answer: C

Explanation:

Swimming is a result of pushing water in the opposite direction of the motion.

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Question (3)

QN0034987

A cannon after firing recoils due to

(A)
conservation of energy
(B)
backward thrust of gases produced
(C)
Newton's third law of motion
(D)
Newton's first law of motion

Correct Answer: C

Explanation:

The gun applied a force on the bullet in forward direction & according to Newton's third law bullet applies a reaction force on gun in backward direction. But the recoil speed of gun is very low in comparison to bullet due to large mass.

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Question (4)

QN0034988

A ball of mass moving perpendicular to the plane of the wall strikes it and rebounds in the same line with the same velocity. If the impulse experienced by the wall is , the velocity of the ball is

(A)
(B)
(C)
(D)

Correct Answer: A

Explanation:

As the ball, rebounds after striking the wall

Change in momentum

Inpulse Change in momentum

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Question (1)

We can derive Newton's

Explanation:

Link:

Question (2)

Swimming is possible on account of

Explanation:

Link:

Question (3)

A cannon after firing recoils due to

Explanation:

Link:

Question (4)

A ball of mass moving perpendicular to the plane of the wall strikes it and rebounds in the same line with the same velocity. If the impulse experienced by the wall is , the velocity of the ball is

Explanation:

Link:

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