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A body is made in the form of wedge with an angle 45°.see figure.a ball of mass m , moving horizontally at a speed v =√2m/s, collides with the wedge of mass M =2m. As a result of the impact, the ball bounces vertically upward . Neglect friction between wedge and horizontal surface. The speed of ball just after impact is Answer : 1m/s

A body is made in the form of wedge with an angle 45°.see figure.a ball of mass m , moving horizontally at a speed v =√2m/s, collides with the wedge of mass M =2m. As a result of the impact, the ball bounces vertically upward . Neglect friction between wedge and horizontal surface. The speed of ball just after impact is
 
Answer : 1m/s

Grade:9

1 Answers

Rituraj Tiwari
askIITians Faculty 1792 Points
3 years ago
According to conservation of momentum,

M1V1+ M2V2= MV

M√2+2m√2 sin45= mv

V=2+ √2m/sec

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