Question

5) Sally has a mass of 50 kg. She ran with a velocity of 20 m/s.

Answer 1

Answer:

10,000 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

$k = \frac{1}{2} \times 50 \times {20}^{2} \\ = 25 \times 400 \\ = 10000$

We have the final answer as

10,000 J

Hope this helps you