A ball is dropped from a height of 10m
Asked by admin @ in Science viewed by 273 People
a ball is dropped from a height of 10m.if energy of the ball reduces by 40% after striking the ground , how high can the ball bounce back? {g = 10ms-2}
Answered by admin @
When the ball is dropped from a certain height, it will have some stored gravitational energy. This energy can be shown by
GPE = m x g x h
The potential energy of gravity is directly affected by the height. When the ball is dropped from a 10m height, it loses 40% energy thus affecting the same percentage of height when it bounces back.
Now 40% of the energy lost means 40% of the height also lost on bouncing back. Given height is 10m and when you lose 40% of 10m, left will be 60% of 10m.
The height of the bounce back is hence 60% of 10m which 6m.
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