Laws of Motion (KVPY Stream SB-SX (Class 12 & 1st Year BSC) 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

Two blocks of different masses connected

Two Blocks of Different Masses Connected

In figure two blocks of different masses 5 m and 4 m in contact on a smooth table. Force P is applied on both the block one by one.

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 TmaxTmin=3 , then, v2rg 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.

8ms1

b.

8000ms1

c.

800ms1

d.

80ms1

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