Question

Estimate the work done on a object of mass 80 kg to change its velocity from 5 m/s to 10 m/s

Answer 1

m = 80 kg

Work = difference of kinetic energy

= \(\frac{1}{2}m(v^2_2-v^2_1)\)

= \(\frac{1}{2}\times80(10^2-5^2)\) = 3000 J