Question

A roller coaster car is traveling down a track at 22 m/s. The car has a mass of 2000 kg. What is the Kinetic energy of the car?

Use the formula

Question 9 options:

968,000 J


484,000 J


44,000 J


22,000 J

Answer 1

Formula for kinetic energy of an object:

KE = 0.5mv²

KE is the kinetic energy, m is the mass, and v is the velocity.

Given values:

m = 2000kg

v = 22m/s

Plug in the values and solve for KE:

KE = 0.5×2000×22²

KE = 484000J

Answer 2

Answer : KE = 484000 J

Explanation :

It is given that,

Mass of the car, m = 2000 kg.

Velocity of the car, v = 22 m/s

Kinetic energy is possessed by virtue of motion of an object.

The formula of kinetic energy is :

`KE=(1)/(2)mv^2`

So,
`KE=(1)/(2)* 2000\ kg* (22\ m/s)^2`

`KE=484000\ J`

So, the correct option is (b) 484000 J.