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1 year ago

The kinetic energy of a baseball that with a mass of 0.140kg is 7 J. What is the baseballs velocity?

Physics

1 answer:

Nuetrik [128]1 year ago

3 0

Answer:

10 m/s

Explanation:

Kinetic energy= $\frac{1}{2}$ mv² where m is mass and v is velocity.

We have to make v the subject so we should rearrange the equation

K= $\frac{1}{2}$ mv²

v²= $\frac{K}{0.5*m}$ (use algebra)

v²= 7/0.5×0.140

v²=100

v=√100

v=10 m/s

We can confirm this by using the kinetic energy formula.

K= $\frac{1}{2}$ ×0.140×10²

K= 7 J

Hence it is proved that velocity is 10 m/s

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