Question

two balls A and B of masses 40g and 50g are moving with speeds 40 ms^-1 and 30 ms^-1 respectively along a straight line in same direction. after collision A starts moving with 20ms^-1 in opposite directions.find speed of ball B. Answer fast please and give correct answers only or you'll be reported. Give answer with explanation and fast.

Answer 1

Answer:

Mass of ball A, m1=40g

Mass of ball B, m2=50g

Initial velocity of ball A,  u1=40m/s

Initial velocity of ball B,  u2=30m/s

Final velocity of ball A, v1=?=v

Final velocity of ball B, v2=25m/s

According to the law of conservation of momentum

m1u1+m2u2=m1v1+m2v2

40×40+50×30=40×v+50×25

1600+1500=40v+1250

3100−1250=40v

1850=40v

v=401850

v=46.45m/s

Hence, Final velocity of ball A, v1=v=46.25m/s

Answer 2

Explanation:

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