Laws of Motion (KVPY Stream-SA (Class 11) Physics): Questions 12 - 15 of 21

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Question number: 12

» Laws of Motion » Force and Inertia

Appeared in Year: 2015

MCQ▾

Question

A parachutist with total weight 75 kg drops vertically onto a sandy ground with a speed of 2 ms–1 and comes to a halt over a distance of 0.25 m. The average force from the ground on her is close to

Choices

Choice (4) Response

a.

1200 N

b.

1350 N

c.

600 N

d.

1950 N

Question number: 13

» Laws of Motion » Static and Kinetic Friction

MCQ▾

Question

A block, resting on the top of a plane inclined at 450 with the horizontal, slides down with an acceleration of . Calculate the coefficient of kinetic friction.

Choices

Choice (4) Response

a.

b.

2

c.

d.

Question number: 14

» Laws of Motion » Law of Conservation of Linear Momentum

MCQ▾

Question

A massless platform of hard paper is kept on a light elastic spring as figure shows. When a particle of mass 500 g is dropped on the platform from a height of 0.32 m, the particle strikes the platform and compresses the spring by 0.05 m. From what height the particle is dropped to get a compression of 0.08 m?

Choices

Choice (4) Response

a.

0.78

b.

0.68

c.

0.86

d.

0.70

Question number: 15

» Laws of Motion » Dynamics of Uniform Circular Motion

MCQ▾

Question

A solid sphere of mass 5 kg rolls on a smooth horizontal surface at . It then rolls up a smooth inclined plane of inclination 600 with the horizontal. The height attained by the sphere before it stops is

Choices

Choice (4) Response

a.

9.8 m

b.

10.28 m

c.

11.14 m

d.

12.22 m

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