The kinetic energy acquired by a mass $m$ in travelling distance $d$, starting from rest, under the

Question

The kinetic energy acquired by a mass $m$ in travelling distance $d$, starting from rest, under the action of a constant force is directly proportional to\

Professor PC Thomas Classes · Answer

(b) : $v^{2}=u^{2}+2 a s$ or $v^{2}-u^{2}=2 a s$\ or $\quad v^{2}-(0)^{2}=2 	imes \frac{F}{m} 	imes s$ or $v^{2}=\frac{2 F s}{m}$\ and K.E. $=\frac{1}{2} m v^{2}=\frac{1}{2} m 	imes \frac{2 F s}{m}=F s$.\ Thus K.E. is independent of $m$ or directly proportional to $m^{0}$.\