Question

An express train of mass 600kg is

moving with a velocity of 180km per
hour.
Calculate its kinetic energy.

Answer 1

Substituting the values into the formula KE = 0.5 x mass x velocity^2 gives a kinetic energy of 750,000 joules.

Step-by-step explanation:

The kinetic energy of an object can be calculated using the formula:

Kinetic Energy (KE) = 0.5 x mass x velocity2

In this case, the mass of the train is given as 600 kg and the velocity is given as 180 km/h. However, the formula requires the velocity to be in meters per second (m/s), so we need to convert it.

1 km/h = 0.277777778 m/s

Therefore, the velocity of the train in m/s is:

180 km/h x 0.277777778 m/s = 50 m/s

Substituting the values into the formula:

KE = 0.5 x 600 kg x (50 m/s)2

KE = 0.5 x 600 x 2500

KE = 750,000 joules

So, the kinetic energy of the express train is 750,000 joules.