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A sphere $P$ of mass $m$ and velocity $\vec{v_{i}}$ undergoes an oblique and perfectly elastic collision with an identical sphere $Q$ initially at rest. The angle $θ$ between the velocities of the spheres after the collision shall be:-

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Important Questions on Centre of Mass, Momentum and Collisions

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Beta Question Bank for Medical: Physics>Chapter 9 - Centre of Mass, Momentum and Collisions>Exercise (Conceptual Questions)>Q 72

A ball is dropped from a height of

10 m

. If

40 %

of its energy is lost on collision with the earth then after the collision the ball will rebound to a height of-

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Beta Question Bank for Medical: Physics>Chapter 9 - Centre of Mass, Momentum and Collisions>Exercise (Conceptual Questions)>Q 73

Which of the following is true :-

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Beta Question Bank for Medical: Physics>Chapter 9 - Centre of Mass, Momentum and Collisions>Exercise (Conceptual Questions)>Q 74

A bullet of mass m is fired into a large block of wood of mass M with velocity v. The final velocity of the system is :-

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Beta Question Bank for Medical: Physics>Chapter 9 - Centre of Mass, Momentum and Collisions>Exercise (Conceptual Questions)>Q 75

A big ball of mass

M

, moving with velocity

u

strikes a small ball of mass

m

, which is at rest. Finally, a small ball attains velocity

u

and a big ball

v

. What is the value of

v

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Beta Question Bank for Medical: Physics>Chapter 9 - Centre of Mass, Momentum and Collisions>Exercise (Conceptual Questions)>Q 76

A particle of mass m moving with speed v towards east strikes another particle of same mass moving with same speed v towards north. After striking, the two particles fuse together. With what speed this new particle of mass 2 m will move in north-east direction?

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Beta Question Bank for Medical: Physics>Chapter 9 - Centre of Mass, Momentum and Collisions>Exercise (Conceptual Questions)>Q 77

Two ice skaters

A

and

B

approach each other at right angles. Skater

A

has a mass

30 kg

and velocity

1 m s^{- 1}

and skater

B

has a mass

20 kg

and velocity

2 m s^{- 1}

. They meet and cling together. Their final velocity of the couple is:

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Beta Question Bank for Medical: Physics>Chapter 9 - Centre of Mass, Momentum and Collisions>Exercise (Previous Year Questions)>Q 1

For inelastic collision between two spherical rigid bodies

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Beta Question Bank for Medical: Physics>Chapter 9 - Centre of Mass, Momentum and Collisions>Exercise (Previous Year Questions)>Q 4

A ball moving with velocity

2 m s^{- 1}

collides head-on with another stationary ball of double the mass. If the coefficient of restitution is

0.5

, then their velocities (in

m s^{- 1}

) after collision will be

A sphere P of mass m and velocity vi→ undergoes an oblique and perfectly elastic collision with an identical sphere Q initially at rest. The angle θ between the velocities of the spheres after the collision shall be:-

Important Questions on Centre of Mass, Momentum and Collisions

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A sphere $P$ of mass $m$ and velocity $\vec{v_{i}}$ undergoes an oblique and perfectly elastic collision with an identical sphere $Q$ initially at rest. The angle $θ$ between the velocities of the spheres after the collision shall be:-