If the energy of ball falling from a height of 10 meters is reduced by 40% how high will it rebound
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Let the mass of ball = m
Initial height of ball = 10m
PE = mgh = 10mg
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After falling, its energy is reduced by 40% when it hits the ground.
After hitting, energy loss = 10mg × 40/100 = 4mg
Energy remaining = 10mg - 4mg = 6mg
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Let the height it attains after rebound = H
PE at height H will be 6mg
=> mg H = 6mg
=> H = 6m
It will rebound to a height of 6m
Initial height of ball = 10m
PE = mgh = 10mg
_______________________
After falling, its energy is reduced by 40% when it hits the ground.
After hitting, energy loss = 10mg × 40/100 = 4mg
Energy remaining = 10mg - 4mg = 6mg
_______________________
Let the height it attains after rebound = H
PE at height H will be 6mg
=> mg H = 6mg
=> H = 6m
It will rebound to a height of 6m
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