# Experimental Skills (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 14 - 17 of 67

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## Question number: 14

» Experimental Skills » Screw Gauge

MCQ▾

### Question

Three identical metal balls each of radius r are placed touching each other on a horizontal surface such that an equilateral triangle is formed, when centers of three balls are joined. The center of the mass of system is located at

### Choices

Choice (4) Response

a.

Line joining centers of any two balls

b.

Centre of one of the balls

c.

Horizontal surface

d.

Point of intersection of the medians

## Question number: 15

» Experimental Skills » Screw Gauge

MCQ▾

### Question

Four particles of masses m, 2m, 3m and 4m are arranged at the corners of a parallelogram with each side equal to a and one of the angle between two adjacent sides is 60°. The parallelogram lies in the x-y plane with mass-m at the origin and 4m on the x-axis. The center of mass of the arrangement will be located at

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 16

» Experimental Skills » Vernier Callipers

MCQ▾

### Question

Two bodies of masses 2 kg and 4 kg are moving with velocities 5 m/s and 8 m/s respectively along same direction. Then the velocity of their center of mass will be

### Choices

Choice (4) Response

a.

5.25 m/s

b.

8.1 m/s

c.

7.3 m/s

d.

6.4 m/s

## Passage

A system consists of block A and B each of mass m connected by a light spring as shown in the figure with block B in contact with a wall. The block A compresses the spring by 3mg /k from natural length of spring and then released from rest. Neglect friction anywhere.

## Question number: 17 (1 of 3 Based on Passage) Show Passage

» Experimental Skills » Screw Gauge

MCQ▾

### Question

Velocity of center of mass of system comprising A ands when block B just loses contact with the wall

### Choices

Choice (4) Response

a.

b.

c.

d.

Question does not provide sufficient data or is vague

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