Work, Energy and Power-Potential Energy (NEET Physics): Questions 1 - 4 of 11

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Question number: 1

» Work, Energy and Power » Potential Energy

MCQ▾

Question

The potential energy between two atoms in a molecule is given by, UX=aX12bX6 where a and b are positive constant and x is the distance between the atoms. The atoms is an stable equilibrium, when-

Choices

Choice (4) Response

a.

x=(2ab)16

b.

x=0

c.

x=(a2b)16

d.

x=x=(11a5b)16

Question number: 2

» Work, Energy and Power » Potential Energy

MCQ▾

Question

If g is the acceleration due to gravity on the earth’s surface, the gain in the potential energy of an object of mass m raised from surface of the earth to a height equal to radius R of the earth is - [M = mass of earth]

Choices

Choice (4) Response

a.

GMR

b.

GMmR

c.

GM2R

d.

GMm2R

Question number: 3

» Work, Energy and Power » Potential Energy

MCQ▾

Question

A body of mass m moving with a velocity v 1 in the X-direction collides with another body of mass M moving in Y-direction with a velocity v 2. They coalesce into one body during collision. The magnitude and direction of the momentum of the final body, will be-

Choices

Choice (4) Response

a.

(mV1)+(MV2),tan1MV2mV1

b.

(mV1)2+(MV2)2,tan1MV1mV2

c.

(mV1)+(MV2),tan1MV1mV2

d.

(mV1)2+(MV2)2,tan1MV2mV1

Question number: 4

» Work, Energy and Power » Potential Energy

MCQ▾

Question

A tennis ball dropped from a height of 2 m rebounds only 1.5 f meter after hitting the ground. What fraction of energy is lost in the impact?

Choices

Choice (4) Response

a.

1/2

b.

1/8

c.

1/4

d.

1/16

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