Question

# The figure shown a ball striking the floor at an angle $$\alpha$$ with speed $$u$$ and rebounds at an angle $$\beta$$ from the floor with speed $$v$$. The value of co-efficient of restitution (e) is

A
vu
B
uv
C
vsinβusinα
D
vsinβucosα

Solution

## The correct option is C $$\dfrac {vsin\beta} {u \sin \alpha}$$e= $$\dfrac{Velocity \ of\ separation } {Velocity \ of \ approach }$$. Since there is no force acting in horizontal direction, velocity taken in equation will be of normal to floor, So e=$$\dfrac {vsin\beta} {usin\alpha}$$Physics

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