Classical Mechanics (CSIR Physical Sciences): Questions 17 - 20 of 55

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Question number: 17

» Classical Mechanics » Periodic Motion » Small Oscillations

Appeared in Year: 2012

MCQ▾

Question

A solid cylinder of height H, radius R and density ρ , floats vertically on the surface of a liquid of density ρ0 . The cylinder will be set into oscillatory motion when a small instantaneous downward force is applied. The frequency of oscillation is – (December)

Choices

Choice (4) Response

a.

ρ0gρH

b.

ρρ0gH

c.

ρgρ0H

d.

ρgρ0H

Question number: 18

» Classical Mechanics » Special Theory of Relativity » Relativistic Kinematics

Appeared in Year: 2012

MCQ▾

Question

Let v,pandE denote the speed, the magnitude of momentum, and the energy of a free particle of rest mass m. Then – (December)

Choices

Choice (4) Response

a.

dEdp=constant

b.

v=cpp2+m2c2

c.

p = mv

d.

E=mc2

Question number: 19

» Classical Mechanics » Dynamical System

Appeared in Year: 2014

MCQ▾

Question

The radius of Earth is approximately 6400 km. The height h at which the acceleration due to Earth’s gravity differs from g at the Earth’s surface by approximately 1 % is – (December)

Choices

Choice (4) Response

a.

48 km

b.

16 km

c.

32 km

d.

64 km

Question number: 20

» Classical Mechanics » Special Theory of Relativity » Relativistic Kinematics

Appeared in Year: 2014

MCQ▾

Question

In a measurement of the viscous drag force experiment by spherical particles in a liquid, the force is found to be proportional to V13 ; where V is the measured value of each particle. If V is measured to be 30mm3 , with an uncertainty of 2.7mm3 , the resulting relative percentage uncertainty in measured force is – (December)

Choices

Choice (4) Response

a.

6

b.

0.09

c.

2.08

d.

3

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