Question

a metal ball falls from a height 1.44 m onto a steel plate and jumps upto a height of 1.21 m find the coefficient of restitution

Answer 1

Hello dear,

● Answer-
e = 0.9167

● Explaination-
# Given-
h = 1.44 m
h' = 1.21 m

# Solution-
Initially at height h,
u = √(2gh)
u = √(2×10×1.44)
u = 5.367 m/s

Initially at height h,
v = √(2gh')
v = √(2×10×1.21)
v = 4.919 m/s

Coefficient of restitution is calculated by-
e = v / u
e = 4.919 / 5.367
e = 0.9167

Therefore, coefficient of restitution is 0.9167 .


Hope this helps...