Question

A bullet of mass 10g moving with a speed of 400m/s find its kinetiv enrgy in calories

Answer 1

$mass \: of \: bullet = 10g \\ velocity = 400 \frac{m}{sec} \\ \\ k.e = \frac{1}{2} mv {}^{2} \\ \: \: \: \: \: \: = \frac{1}{2} \times 10 \times 400 {}^{2} \\ \: \: \: \: \: \: = 5 \times 160000 \\ \: \: \: \: \: \: = 800000j.$

Answer 2

• KE=1600kgm.m/s
• 1J=4.18Cal
• so 382.77