Classical Mechanics-Conservation Laws (GATE Physics): Questions 1 - 3 of 4

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Question number: 1

» Classical Mechanics » Conservation Laws

Appeared in Year: 2015

MCQ▾

Question

Four forces are given below in Cartesian and spherical polar coordinates.

(i) F1=Kexp(r2R2)r^

(ii) F2=K(x3y^y3z^)

(iii) F3=K(x3x^+y3y^)

(iv) F4=K(ϕ^r)

Where K is a constant. Identify the correct option.

Choices

Choice (4) Response

a.

(i) and (ii) are conservative but (iii) and (iv) are not

b.

(ii) and (iii) are conservative but (i) and (iv) are not

c.

(iii) and (iv) are conservation but (i) and (ii) are not

d.

(i) and (iii) are conservative but (ii) and (iv) are not

Question number: 2

» Classical Mechanics » Conservation Laws

Appeared in Year: 2014

MCQ▾

Question

The recoil momentum of an atom is pA when it emits an infrared photon of wavelength 1500nm , and it is pB when it emits a photon of visible wavelength 500nm . The ratio pApB is –

Choices

Choice (4) Response

a.

1:1

b.

1:3

c.

1:3

d.

3:2

Question number: 3

» Classical Mechanics » Conservation Laws

Appeared in Year: 2015

MCQ▾

Question

A particle with rest mass M is at rest and decays into two particles of equal rest masses 310M , which move along the Z – axis. Their velocities are given by,

Choices

Choice (4) Response

a.

v1=v2=(0.8c)z^

b.

v1=v2=(0.6c)z^

c.

v1=v2=(0.8c)z^

d.

v1=(0.6c)z^;v2=(0.8c)z^

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