Laws of Motion-Law of Conservation of Linear Momentum (KVPY Stream-SA (Class 11) Physics): Questions 1 - 3 of 3

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Question number: 1

» Laws of Motion » Law of Conservation of Linear Momentum

MCQ▾

Question

Two balls m1 and m2 are moving in the straight line, approaching each other as shown. After collision these objects stick together. What will be the velocity (in m/s) of the combined object after collision?

 System consist of two balls

System Consist of Two Balls

In figure two balls approaching to each other. Mass m1 and m2 of the balls are 15 and 25 respectively. Velocity V1 and V2 of the balls are 20 m/s and 5 m/s respectively.

Choices

Choice (4) Response

a.

3.75

b.

5.454

c.

6.523

d.

4.375

Question number: 2

» Laws of Motion » Law of Conservation of Linear Momentum

MCQ▾

Question

A stationary U238 nucleus emits on α-particle (2He4) with velocity 1.2×107msec and kinetic energy 3.8 MeV. What is the velocity of the residual nucleus?

Choices

Choice (4) Response

a.

3.02×105msec

b.

2.05×105msec

c.

2.50×105msec

d.

4.15×105msec

Question number: 3

» Laws of Motion » Law of Conservation of Linear Momentum

MCQ▾

Question

A massless platform of hard paper is kept on a light elastic spring as figure shows. When a particle of mass 500 g is dropped on the platform from a height of 0.32 m, the particle strikes the platform and compresses the spring by 0.05 m. From what height the particle is dropped to get a compression of 0.08 m?

A platform attached on the spring

A Platform Attached on the Spring

In figure a platform of hard paper is attached on the spring. And a particle of mass 500 gm is dropped from height 0.32 m.

Choices

Choice (4) Response

a.

0.78

b.

0.68

c.

0.86

d.

0.70

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