Gamma Question Bank for Medical Physics>Chapter 5 - Laws of Motion>Assignment>Q 4

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An object of mass $2 kg$ is sliding with a constant velocity $4 m s^{- 1}$ on a frictionless horizontal table. The force required to keep the object moving with the same velocity is

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Important Questions on Laws of Motion

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Gamma Question Bank for Medical Physics>Chapter 5 - Laws of Motion>Assignment>Q 5

From Newton's second law of motion, it can be inferred that

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Gamma Question Bank for Medical Physics>Chapter 5 - Laws of Motion>Assignment>Q 6

If a force of constant magnitude acts in direction perpendicular to the motion of a particle, then its

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Gamma Question Bank for Medical Physics>Chapter 5 - Laws of Motion>Assignment>Q 7

When a force of constant magnitude and a fixed direction acts on a moving object, then its path is

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Gamma Question Bank for Medical Physics>Chapter 5 - Laws of Motion>Assignment>Q 8

A

10 g

bullet moving at

200 m s^{- 1}

stops after penetrating

5 cm

of wooden plank. The average force exerted on the bullet will be

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Gamma Question Bank for Medical Physics>Chapter 5 - Laws of Motion>Assignment>Q 9

A ball of mass

50 g

is dropped from a height of

20 m .

A boy on the ground hits the ball vertically upwards with a bat with an average force of

200 N,

so that it attains a vertical height of

45 m .

The time for which the ball remains in contact with the bat is

[Take g = 10 m s^{- 2}],

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Gamma Question Bank for Medical Physics>Chapter 5 - Laws of Motion>Assignment>Q 10

A string tied on a roof can bear a maximum tension of

50 kg wt .

The minimum acceleration that can be acquired by a man of

98 kg

to descend will be

[Take g = 9.8 m s^{- 2}]

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Gamma Question Bank for Medical Physics>Chapter 5 - Laws of Motion>Assignment>Q 11

When a

4 kg

rifle is fired, the

10 g

bullet receives an acceleration of

3 \times 10^{6} cm s^{- 2} .

The magnitude of the force acting on the rifle (in newton) is

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Gamma Question Bank for Medical Physics>Chapter 5 - Laws of Motion>Assignment>Q 12

In which of the following graphs, the total change in momentum is zero?