Work, Energy and Power-Conservation of Mechanical Energy (KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 1 - 3 of 6

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Question number: 1

» Work, Energy and Power » Conservation of Mechanical Energy

Appeared in Year: 2010

MCQ▾

Question

Two identical particles of mass ‘m’ and charge q are shot at each other from a very great distance with an initial speed v. The distance of closest approach of these charges is –

Choices

Choice (4) Response

a.

0

b.

q24πε0mv2

c.

q22πε0mv2

d.

q28πε0mv2

Question number: 2

» Work, Energy and Power » Conservation of Mechanical Energy

Appeared in Year: 2013

MCQ▾

Question

A point particle of mass 0.5 kg is moving along the x-axis under a force described by the potential energy V shown below. It is projected towards the right from the origin with a speed v. What is the minimum value of v for which the particle will escape infinitely far away from the origin?

Graph of potential energy verses position on x-axis

Graph of Potential Energy Verses Position on X-Axis

Figure shows a point particle of mass 0.5 kg is moving along the x-axis under a force described by the potential energy V.

Choices

Choice (4) Response

a.

22ms1

b.

2ms1

c.

4ms1

d.

All of the above

Question number: 3

» Work, Energy and Power » Conservation of Mechanical Energy

Appeared in Year: 2014

MCQ▾

Question

A solid cylinder P rolls without slipping from rest down an inclined plane attaining a speed vp at the bottom. Another smooth solid cylinder Q of same mass and dimensions slides without friction from rest down the inclined plane attaining a speed vq at the bottom. The ratio of the speeds vpvq is –

Choices

Choice (4) Response

a.

(43)

b.

(32)

c.

(34)

d.

(23)

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