Laws of Motion (NEST (National Entrance Screening Test) Physics): Questions 1 - 2 of 2

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Question number: 1

» Laws of Motion » Static and Kinetic Friction

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Appeared in Year: 2007

MCQ▾

Question

A cubical container is placed on a frictionless horizontal surface. A molecule of a gas in the container hits a vertical wall of the container normally and rebounds with the same speed. In elastic collision the container picks up –

[‘Finite’ means ‘comparable to the corresponding molecular quantity’. ]

Choices

Choice (4) Response

a.

Negligible momentum, kinetic energy and velocity.

b.

Finite kinetic energy, but negligible momentum and velocity.

c.

Finite momentum and finite kinetic energy but negligible velocity.

d.

Finite momentum, but negligible kinetic energy and velocity.

Question number: 2

» Laws of Motion » Equilibrium of Concurrent Forces

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Appeared in Year: 2014

MCQ▾

Question

A girl of mass jumps from the shore onto a stationary boat of equal mass floating on a still pond. She jumps back to the shore almost immediately. Here speed in both cases is with respect to the shore. Consider het entire motion to be horizontal and in one dimension. Ignore friction and drag forces. The speed of the boat with respect to the shore after she jumps back is –

Choices

Choice (4) Response

a.

b.

c.

d.

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