A vechicle of mass 30 quintals moving with a speed of 80 km per hour collides with another vehicle of mass 90 quintals moving with the speed of 14.4 Kimi power in the opposite direction. what will be the velocity of of each other the collision?
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A ball of mass 10kg moving with velocity 20m/s collided elastically with the wall and rebound with the same speed .
so, initial momentum of the ball = mv
= 10kg × 20 m/s = 200 kgm/s
final momentum of the ball = m(-v)
[ here negative sign shows that velocity of ball is just opposite direction of its initial motion.]
so, final momentum of the ball = -10 × 20 = -200 kgm/s
hence, change in momentum = final momentum - initial momentum
= -200 - 200 = - 400 kgm/s
hence, magnitude of change in momentum of the ball is 400 kgm/s
Explanation:
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