Question

A toy car of mass $5 \,kg$ moves up a ramp under the influence of force $F$ plotted against displacement $x$. The maximum height attained is given by

• A. $y_{\max }=20 \,m$
• B. $y_{\max }=15 \,m$
• C. $y_{\max }=11 \,m$
• D. $y_{\max }=5\, m$

Answer 1

Answer: (C)

Work done = Gain in potential energy
Area under curve $=m g h$
$\Rightarrow \frac{1}{2} \times 11 \times 100=5 \times 10 \times h $
$\Rightarrow h=11 \,m$