Question

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

What was her KE as she crossed the finish line?

Answer 1

10,000 J

Step-by-step explanation:

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

`k = (1)/(2) m {v}^(2) \\`

m is the mass

v is the velocity

From the question we have

`k = (1)/(2) * 50 * {20}^(2) \\ = 25 * 400 \\ = 10000`

We have the final answer as

10,000 J

Hope this helps you