Question

The runner below has a mass of 55 kg and is moving at 3.87 m/s. what is his kinetic energy in joules

Answer 1

Answer:

411.86 J

Explanation:

The kinetic energy of an object can be found by using the formula

$k = \frac{1}{2} m {v}^{2}$

m is the mass

v is the velocity

From the question we have

$k = \frac{1}{2} \times 55 \times {3.87}^{2} \\ = 27.5 \times 14.9769 \\ = 411.86475$

We have the final answer as

411.86 J

Hope this helps you