# Laws of Motion (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 8 - 11 of 20

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## Question number: 8

» Laws of Motion » Equilibrium of Concurrent Forces

Appeared in Year: 2015

MCQ▾

### Question

Two blocks of masses 5m and 4m in contact on a smooth table. A force P is first applied horizontally on block of mass 5 m and then on 4m. The contact forces between the two blocks in the two cases in the ratio

### Choices

Choice (4) Response

a.

3: 2

b.

5: 3

c.

2: 3

d.

1: 2

## Question number: 9

» Laws of Motion » Force and Inertia

MCQ▾

### Question

A water drop of mass m = 80 mg is introduced between two plates with separation d = 0.06 mm. Calculate the force of attraction between the plates.

### Choices

Choice (4) Response

a.

3.11 N

b.

3.0 N

c.

3.87 N

d.

2.17 N

## Question number: 10

» Laws of Motion » Equilibrium of Concurrent Forces

MCQ▾

### Question

An object is tied to a string and rotated in a vertical radius r. Constant speed is maintained along the trajectory. If, then, is –

(T indicates tension in the string)

### Choices

Choice (4) Response

a.

1

b.

3

c.

4

d.

2

## Question number: 11

» Laws of Motion » Law of Conservation of Linear Momentum

MCQ▾

### Question

A bob of mass 0.575 kg hangs from the massless string of a long simple pendulum. A bullet of mass 0.025 kg is fired vertically from below into the bob. The bullet gets embedded into the bob and the combination rises vertically through a height of 0.8 m. If g = 10 ms-2, then the velocity of the bullet is –

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page