Question

a marble of mass 25g moving horizontal at 10m/s collides head on with 40g marble moving with a velocity of 6m/s in opposite direction .if the collision is elastic ,find their respective velocities after collision​

Answer 1

Explanation:

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Answer 2

Explanation:

Mass of ball A, m

1

=40g

Mass of ball B, m

2

=50g

Initial velocity of ball A, u

1

=40m/s

Initial velocity of ball B, u

2

=30m/s

Final velocity of ball A, v

1

=?=v

Final velocity of ball B, v

2

=25m/s

According to the law of conservation of momentum

m

1

u

1

+m

2

u

2

=m

1

v

1

+m

2

v

2

40×40+50×30=40×v+50×25

1600+1500=40v+1250

3100−1250=40v

1850=40v

v=

40

1850

v=46.45m/s

Hence, Final velocity of ball A, v

1

=v=46.25m/s