Question

A body of mass $2kg$ is projected vertically upwards with speed of $3m/s$. The maximum gravitational potential energy of the body is (in J)

• A. $18$
  
• B. $4.5$
  
• C. $9$
  
• D. $2.5$
  

Answer 1

The correct option is C $9$

Maximum height attained $=h=\frac{v^2}{2g}=\frac{4.5}{g}$

Maximum gravitational potential energy $=mgh=2\times 4.5=9J$

Hence correct answer is option $C$