Question

Which has greater kinetic energy: a bowling ball that has a mass of 5 kg travelling at 6 m/s, or a ship that has a mass of 120000 kg and is moving at 0.02 m/s?

Answer 1

Answer:

The bowling ball has greater kinetic energy.

Explanation:

Kinetic energy is given by:

$K = \frac{1}{2}mv^{2}$

Where:

m: is the mass

v: is the speed

For the bowling ball we have:

$K = \frac{1}{2}mv^{2} = \frac{1}{2}5 kg*(6 m/s)^{2} = 90 J$

And for the ship:

$K = \frac{1}{2}mv^{2} = \frac{1}{2}120000 kg*(0.02 m/s)^{2} = 24 J$

Therefore, the bowling ball has greater kinetic energy.

I hope it helps you!