question_answer

A body throws balls vertically upwards. He throws one, while the previous one is at its highest point. Maximum height reached by a ball if he throws one ball each per second at uniform speed is

A)  19.6 m                 

B)  9.8 m

C)  4.9 m   

D)  2.45 m

Correct Answer: C

Solution :

  \[{{t}_{a}}=1=\frac{u}{g}\]\[\Rightarrow \]\[u=gm/s\] \[h=\frac{{{h}^{2}}}{y}=\frac{g\times g}{2\times g}=4.9\,m\]