Question

If the 0.10 kg baseball on the right has a
kinetic energy of 5 J, what is its velocity?

Answer 1

10 m/s

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

Since we're finding the velocity we make v the subject

That's

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

From the question

k = 5 J

m = 0.1 kg

We have

`v = \sqrt{ (2 * 5)/(0.1) } = \sqrt{ (10)/(0.1) } = √(100) \\ = 10`

We have the final answer as

10 m/s

Hope this helps you