Question

A train travelling at 20 m/s has 2 000 000 J of kinetic energy. What is the mass of
the train?

Answer 1

10,000 kg

Step-by-step explanation:

.

Answer 2

10,000 kg

Step-by-step explanation:

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

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

k is the kinetic energy

v is the velocity

From the question we have

`m \frac{2(2000000)}{ {20}^(2) } = (4000000)/(400) = (40000)/(4) \\`

We have the final answer as

10,000 kg

Hope this helps you