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```        Q.A projectile is fired on a horizontal ground.Coefficient of restitution between the projectile and the ground is e.Let a,b and c be the ratio of time of flight T(1)/T(2), max. height (H(1) / H(2) ) and horizontal range (R1/R2) in first two collisions with the ground.Then:(Options)

a. a = 1/e;
b= 1/e ;
c=1/e^2(e square)
or d. all of the above.```
7 years ago

419 Points
```										Dear Raj
Effect of cofficient of restitution can be calculated be vertical velocity say v effect.
Time of flight  proportional v
max height prportional to v^2
Haorizontal range prportional to v
T(1)/T(2)=1/e
H(1)/H(2)=1/e^2
R(1)/R(2)=1/e
So option a is correct
All the best.
AKASH GOYAL

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7 years ago
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