Question

Two spherical balls A and B (m1=2kg and m2=5kg) are
moving with a velocity 5m/s and 3m/s respectively. They
collide and after collision the second call moves with a
velocity of 1.8m/s. Find the final velocity of the first ball.​

Answer 1

Answer:

Two balls with masses m

1

=3kg and m

2

=5kg have initial velocities ν

1

=ν

2

=5m/s in the direction shown in Fig. They collide at the origin.

a. Find the velocity of the CM 3s before the collision.

b. Find the position of the CM 2s after the collision

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Answer 2

Explanation:

Mass of A = 2kg

Initial velocity of A (u1)= 5m/s

Mass of B = 5kg

Initial velocity of B (u2)= 3m/s

Using m1u1 + m2u2 = m1v1 + m2v2

(2)(5) + (5)(3) = (2)(v) + (5)(1.8)

10 + 15 = 2v + 9

25 = 2v + 9

2v = 16

v = 8m/s

Final velocity of the first ball is 8m/s