Question

In a game of pool, the white cue ball hits the #5 ball and stops, while the #5 ball moves away with the same velocity as the cue ball had originally.

The type of collision is:
A) completely inelastic.
B) inelastic.
C) elastic.
D) any of the above, depending on the mass of the balls.

Answer 1

Answer: C. Elastic

Step-by-step explanation:

Answer 2

C) elastic.

Step-by-step explanation:

Given that the mass of the both cue ball is same.

As we know that if there is no any external force on the system then the total linear momentum of the system will be conserve.

P = Mass x velocity

Lets take initial velocity of the first ball = u m/s

Lets take final velocity of the second ball = v m/s

Final velocity of the first ball = 0 m/s

The coefficient of restitution for the perfectly elastic motion is 1.

`e=(v-0)/(u-0)`

Given that v= u

That is why

e = 1

The answer will be C.