Question

A 70-kg man is walking at a speed of 2.0 m/s. What is his kinetic energy (energy is measured in Joules)?

Answer 1

$\binom{1}{2} mv {}^{2}$

$\binom{1}{2} \times 70 \times 2.0 {}^{2}$

$\binom{1}{2} \times 70 \times 2.0 \times 2.0$

=70×2.0

=1400J