Elastic and Inelastic Collisions in One and Two Dimensions NEET Questions

Physics - Work, Energy, and Power

Elastic and Inelastic Collisions in One and Two Dimensions MCQ Questions


1.
In ALL types of collisions, which physical quantity is necessarily conserved?
A.
Total kinetic energy
B.
Total linear momentum
C.
Total mechanical energy
D.
Velocity of each body
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ANSWER :
B. Total linear momentum
2.
An elastic collision is defined as a collision in which:
A.
Only momentum is conserved
B.
Only kinetic energy is conserved
C.
Both momentum and kinetic energy are conserved
D.
The two bodies stick together after collision
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ANSWER :
C. Both momentum and kinetic energy are conserved
3.
A completely inelastic collision is one in which:
A.
Kinetic energy is fully conserved
B.
The two bodies stick together and move with a common velocity after collision
C.
Momentum is not conserved
D.
The collision is in two dimensions only
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ANSWER :
B. The two bodies stick together and move with a common velocity after collision
4.
In an inelastic collision (not completely inelastic), compared to an elastic collision:
A.
More KE is lost; less deformation
B.
Some KE is lost; deformation is partly relieved
C.
No KE is lost
D.
Momentum is not conserved
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ANSWER :
B. Some KE is lost; deformation is partly relieved
5.
Body A of mass 4m moving with speed uuu collides elastically and head-on with another body B of mass 2m at rest. The fraction of energy lost by the colliding body A is:

NEET - 2019

A.
2/3
B.
1/3
C.
8/9
D.
4/9
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ANSWER :
B. 1/3
6.
During the short collision time Δt, which quantity IS conserved at every instant?
A.
Kinetic energy (elastic collision only)
B.
Total linear momentum
C.
Potential energy
D.
Speed of each particle
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ANSWER :
B. Total linear momentum