Experimental Skills (NEET Physics): Questions 22 - 25 of 67

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Question number: 22

» Experimental Skills » Screw Gauge

MCQ▾

Question

2 bodies of different masses of 3 kg and 6 kg are moving with, velocities 20 m/s and 10 m/s towards each other due to mutual gravitational attraction. What is the velocity of their center of mass?

Choices

Choice (4) Response

a.

6 m/s

b.

5 m/s

c.

Zero

d.

8 m/s

Question number: 23

» Experimental Skills » Screw Gauge

MCQ▾

Question

If linear density of a rod of length 3m varies as λ = 2 + x them the position of the center of gravity of the rod is

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 24

» Experimental Skills » Screw Gauge

MCQ▾

Question

Choose the wrong statements about the center of mass (CM) of a system of two particles

(1) The CM lies on the line joining the two particles midway between them

(2) The CM lies on the line joining them at a point whose distance from each particle is proportional to the square of the mass of that particle

(3) The CM is on the line joining them at a point whose distance from each particle is proportional to the mass of that particle

(4) The CM lies on the line joining them at a point whose distance from each particle is inversely proportional to the mass of that particle

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1 and 2 are correct

c.

1, 2 and 3 are correct

d.

1 and 3 are correct

Question number: 25

» Experimental Skills » Vernier Callipers

MCQ▾

Question

A 4 kg body and a 3 kg body are moving along the x-axis. At a particular instant the 2 kg body has a velocity of 3 ms -1 and the 3 kg body has the velocity of 2ms -1. The velocity of the center of mass at that instant is

Choices

Choice (4) Response

a.

5 ms -1

b.

1 ms -1

c.

2.57

d.

None of the above

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