1.

A tennis ball dropped from a height of 2 m  rebounds only 1.5 m after hitting the ground. What fraction of its energy is lost in the impact

A.  \[\frac{1}{4}\]  
B.  \[\frac{1}{2}\]
C.  \[HSO_{4}^{-}\]  
D.  \[\frac{1}{8}\]
Answer» B.  \[\frac{1}{2}\]


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