Question

Car A of mass 1500Kg travelling at 25 m/s collides with another car B of mass 1000Kg travelling at 15 m/s in the same direction. After collision, the velocity of car A becomes 20 m/s. Calculate the velocity of car B after collision

Answer 1

Hi friend
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Your answer
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MASS OF CAR A = M1 = 1500 Kg

INITIAL VELOCITY OF CAR A = U1 = 25 m/s

FINAL VELOCITY OF CAR A = V1 = 20 m/s

MASS OF CAR B = M2 = 1000 Kg

INITIAL VELOCITY OF CAR B = U2 = 15 m/S

FINAL VELOCITY OF CAR B = V2 =?

ACCORDING TO THE CONCEPT CONSERVATION OF MASS
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M1U1 + M2U2 = M1V1 + M2V2

(1500 × 25) + (1000 × 15) = (1500 × 20) + (1000 × V2)

37500 + 22500 = 30000 + 1000V2

60000 = 30000 + 10000V2

1000V2 = 60000 - 30000

1000V2 = 30000

V2 = 30000/1000

V2 = 30 m/s

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