Work, Energy and Power-Conservation of Mechanical Energy (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics): Questions 4 - 5 of 5

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Question number: 4

» Work, Energy and Power » Conservation of Mechanical Energy

Appeared in Year: 2015

MCQ▾

Question

One end of a slack wire (Young’s modulus Y, length L and cross-sectional area A) is clamped to a rigid wall and the other end to a block (mass m) which rests on a smooth horizontal plane. The block is set in motion with a speed v. What is the maximum distance the block will travel after the wire becomes taut?

Choices

Choice (4) Response

a.

vmL2AY

b.

LmvAY

c.

vmLAY

d.

v2mLAY

Question number: 5

» Work, Energy and Power » Conservation of Mechanical Energy

MCQ▾

Question

A child is sitting on a swing. Its minimum and maximum heights from the ground are 0.55 m and 3 m respectively. What will be its maximum speed?

Choices

Choice (4) Response

a.

14ms

b.

12ms

c.

7ms

d.

5ms

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