Question

Determine the kinetic energy of a 1000-kg roller coaster car that is moving with a speed of 20.0 m/s.

196000 N
200000 N
200000 J
196000 J

Answer 1

The correct answer is - 200000 J

Step-by-step explanation:

We use the formula of kinetic energy:

The formula to calculate kinetic energy is,

Here,

Ec =1/2 x m x v^2

The mass of the roller coaster is, m = 1000 k g

The speed of the roller coaster is, v = 20.0 m/s

Therefore,

Ec=1/2 x 1000kg x (20m/s)^2 = 200.000Joule

200,000J