Question

If the ceiling would not have been their, how high he would have gone?

• A. $2.4m$
• B. $2.1m$
• C. $1.7m$
• D. $1.4m$

Answer 1

The correct option is D $1.4m$

Mg compresses the spring as,
$k\times \left(0.18\right)=Mg$
or $k=\frac{Mg}{0.18}$
$\left(\frac{k{x}^2}{2}\right)=Mgh,\frac{mg(0.71{)}^2}{2\times 0.18}=mgh$
$\therefore h=1.4m$