Work, Energy and Power-Elastic and Inelastic Collisions (NEET Physics): Questions 4 - 7 of 7

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Question number: 4

» Work, Energy and Power » Elastic and Inelastic Collisions

MCQ▾

Question

Which of the following statements is false for collisions-

(1) Momentum is conserved in elastic collisions but not in inelastic collisions.

(2) Total-kinetic energy is conserved in elastic collisions but momentum is not conserved.

(3) Total kinetic energy and momentum both are conserved in all types of collisions

(4) Total kinetic energy is not conserved in inelastic collisions but momentum is conserved

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

Choices

Choice (4) Response
a.

1 and 3 are correct

b.

1 and 2 are correct

c.

1, 2 and 3 are correct

d.

2 and 4 are correct

Question number: 5

» Work, Energy and Power » Elastic and Inelastic Collisions

MCQ▾

Question

Inelastic collision is the-

Choices

Choice (4) Response
a.

Collision of ideal gas molecules with the walls of the container

b.

collision of electron and positron to an annihilate each other.

c.

collision of two rigid solid spheres lying on a frictionless table

d.

scattering of a-particles with the nucleus of gold atom

Question number: 6

» Work, Energy and Power » Elastic and Inelastic Collisions

MCQ▾

Question

In an inelastic collision-

Choices

Choice (4) Response
a.

the momentum and kinetic energy are conserved

b.

neither momentum nor kinetic energy is conserved

c.

momentum is not conserved but kinetic energy is conserved

d.

Momentum is conserved but kinetic energy is not conserved

Question number: 7

» Work, Energy and Power » Elastic and Inelastic Collisions

Assertion-Reason▾

Assertion (Ꭺ)

In an elastic collision in one dimension between two bodies, total momentum remains the same before, during and after the collision.

Reason (Ꭱ)

In an elastic collision in one dimension between two bodies, total kinetic energy remains the same before, during and after the collision. [Assume external forces are absent in both the above statements],

Choices

Choice (4) Response
a. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
b. Ꭺ is false but Ꭱ is true
c. Ꭺ is true but Ꭱ is false
d. Both Ꭺ and Ꭱ are false

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