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A ball moving with a velocity of 6 m/s strikes an identical stationary ball. After collision each ball moves at an angle of   with the original line of motion. What are the speeds of the balls after the collision?

a)

/2 m/s

b)

3 m/s

c)

2  m/s

d)

 m/s



Question ID - 100438 | SaraNextGen Top Answer

A ball moving with a velocity of 6 m/s strikes an identical stationary ball. After collision each ball moves at an angle of   with the original line of motion. What are the speeds of the balls after the collision?

a)

/2 m/s

b)

3 m/s

c)

2  m/s

d)

 m/s

1 Answer
127 votes
Answer Key / Explanation : (c) -

(c)

Applying the law of conservation of momentum in perpendicular to the initial line of motion,

or

Hence, speed of both will be same after collision

Now along the line of motion,

(ii)

Putting Eq.(i) in Eq. (ii),

Or  m/s

127 votes


127