A projectile is thrown horizontally from top of a tower of height 20 m with a velocity 10 m/sec. It strikes the smooth ground whose co-efficient of restitution is 0.5. [g = 10 m/s 2 ] (neglect friction):
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(b, d)
t AB = 
= 2 sec
Before collision at B
V X = 10 m/s V y = 20 m/s
After collision at B.
V X ' = 10 m/s V y ' = eV y = 
× 20 = 10 m/s
t BC = 
= 2 sec
T = t AB + t BC = 4 sec.
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