Question

A ball is dropped from a height of 20 cm. Ball rebound to a height of 10 cm. What is the loss of energy ?

• A. 25%
• B. 75%
• C. 50%
• D. 100%

Answer 1

Answer: (C)

50%

Answer 2

% loss = × 100 = × 100

= $\frac { 20 - 10 } { 10 }$× 100 = 50 %