A Ball Is Dropped From A Height of 10m If The Energy of the ball reducesby 40%after striking the ground how much high high can the ball bounce back
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Answer: Height at which the ball will bounce back is 6 meters
Given parameters
Ball dropped at the height (h) = 10 m
g = 10ms-2
Total energy of the ball = m × g× h
Total energy of the ball = m × 10 × 10
Total energy of the ball = 100 mJ
The ball loses 40 percent of its initial energy on striking the ground level
⇒ (40/100) × 100 mJ
The ball loses 40 percent of its initial energy on striking the ground level = 40 mJ
Energy left to hit the ground = 100 m J – 40 m J
Energy left to hit the ground = 60 mJ
∴ Final energy of the ball = 60 mJ
Height at which the ball will bounce back
H = 60/10
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