Q. 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) $y_{\max} = 20m$
B) $y_{\max} = 15m$
C) $y_{\max} = 11m$
D) $y_{\max} = 5m$
Explanation
(c) Work done = Gain in potential energy
Area under curve $= mgh$
$\Rightarrow \frac{1}{2}\ \times 11 \times 100 = 5 \times 10 \times h \Rightarrow h = 11m$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.