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Question (1)

QN0035226

Which one of the following statements is true?

(A)
Momentum is conserved in elastic collisions but not in inelastic collisions
(B)
Total kinetic energy is conserved in elastic collisions but momentum is not conserved in elastic collisions
(C)
Total kinetic energy is not conserved but momentum is conserved in inelastic collisions
(D)
Kinetic energy and momentum both are conserved in all types of collisions

Correct Answer: C

Explanation:

The law of conservation of momentum is true in all type of collisions, but kinetic energy is conserved only in elastic collision. The kinetic energy is not conserved in inelastic collision but the total energy is conserved in all type of collisions.

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Question (2)

QN0035227

When after collision the deformation is not relived and the two bodies move together after the collision, it is called

(A)
elastic collision
(B)
inelastic collision
(C)
perfectly inelastic collision
(D)
perfectly elastic collision

Correct Answer: C

Explanation:

In a perfectly inelastic collision, the two bodies move together as one body

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Question (3)

QN0035228

In an inelastic collision, which of the following does not remain conserved?

(A)
Momentum
(B)
kinetic energy
(C)
Total energy
(D)
Neither momentum nor kinetic energy

Correct Answer: B

Explanation:

In an inelastic collision, momentum remains conserved, but K.E is changed.

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Question (4)

QN0035229

In case of elastic collision, at the time of impact.

(A)
total K.E. of colliding bodies is conserved.
(B)
total K.E. of colliding bodies increases
(C)
total K.E. of colliding bodies decreases
(D)
total momentum of colliding bodies decreases.

Correct Answer: C

Explanation:

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Question (5)

QN0035230

In elastic collision, energy transfer takes place when

(A)
(B)
(C)
(D)

Correct Answer: A

Explanation:

During elastic collision between two equal masses, the velocities get exchanged. Hence energy transfer is maximum when .

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Question (6)

QN0035231

If two equal masses collide elastically in one dimension, where is at rest and moves with a velocity , then the final velocities of two masses are

(A)
(B)
(C)
and
(D)

Correct Answer: A

Explanation:

In an elastic collision

if , then ; and

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Question (7)

QN0035232

A particle suffers an oblique elastic collision with a particle that is at rest initially. If their masses are the same, then after collision

(A)
they will move in opposite directions
(B)
A continues to move in the original direction while remains at rest
(C)
they will move in mutually perpendicular directions
(D)
A comes to rest and B starts moving in the direction of the original motion of

Correct Answer: C

Explanation:

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Question (8)

QN0035233

A metal ball of mass moving with a velocity of has a head on collision with a stationary ball of mass . If after the collision, the two balls move together, the loss in kinetic energy due to collision is

(A)
(B)
(C)
(D)

Correct Answer: C

Explanation:

Apply conservation of momentum,

Here

K.E. initial

K.E. (Final)

Loss in K.E.

Alternatively use the formula

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Question (9)

QN0035234

Two particles having the position and m move with velocities and . If the particles collide, then value of a must be

(A)
8
(B)
6
(C)
4
(D)
2

Correct Answer: A

Explanation:

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Question (10)

QN0035235

A mass of moving with a speed of collides with another stationary mass of . As a result of the collision, the two masses stick together. The kinetic energy of the composite mass will be

(A)
600
(B)
800
(C)
1000
(D)
1200

Correct Answer: B

Explanation:

.

K. E. of composite mass

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Question (1)

Which one of the following statements is true?

Explanation:

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Question (2)

When after collision the deformation is not relived and the two bodies move together after the collision, it is called

Explanation:

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Question (3)

In an inelastic collision, which of the following does not remain conserved?

Explanation:

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Question (4)

In case of elastic collision, at the time of impact.

Explanation:

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Question (5)

In elastic collision, energy transfer takes place when

Explanation:

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Question (6)

If two equal masses collide elastically in one dimension, where is at rest and moves with a velocity , then the final velocities of two masses are

Explanation:

Link:

Question (7)

A particle suffers an oblique elastic collision with a particle that is at rest initially. If their masses are the same, then after collision

Explanation:

Link:

Question (8)

A metal ball of mass moving with a velocity of has a head on collision with a stationary ball of mass . If after the collision, the two balls move together, the loss in kinetic energy due to collision is

Explanation:

Link:

Question (9)

Two particles having the position and m move with velocities and . If the particles collide, then value of a must be

Explanation:

Link:

Question (10)

A mass of moving with a speed of collides with another stationary mass of . As a result of the collision, the two masses stick together. The kinetic energy of the composite mass will be

Explanation:

Link:

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