A bullet of mass 10 g leaves a rifle at an initial velocity of $1000 \mathrm{~m} / \mathrm{s}$ and s

Question

A bullet of mass 10 g leaves a rifle at an initial velocity of $1000 \mathrm{~m} / \mathrm{s}$ and strikes the earth at the same level with a velocity of $500 \mathrm{~m} / \mathrm{s}$. The work done in joule for overcoming the resistance of air will be\

Professor PC Thomas Classes · Answer

(b) : Work done = change in kinetic energy of the body $W=\frac{1}{2} 	imes 0.01\left[^{2}-(500)^{2}ight]=3750$ joule