Question

A car moving at a speed of 20m/s has a kinetic energy of 300,000 J what’s the cars mass

Answer 1

Answer:

1500 kg

Explanation:

The mass of the car can be found by using the formula

$m = \frac{2k}{ {v}^{2} }$

From the question we have

$m = \frac{2 \times 300000}{ {20}^{2} } = \frac{600000}{400} = \frac{6000}{4}$

We have the final answer as

1500 kg

Hope this helps you