Question

When traveling at top speed, a roller coaster train with a mass of 12,000 kg has a velocity of 30 m/s. The kinetic energy of the train at top speed is

Answer 1

When traveling at top speed, a roller coaster train with a mass of 12,000 kg has a velocity of 30 m/s. The kinetic energy of the train at top speed is 5,400,000

Answer 2

Step-by-step explanation:

Kinetic energy is the energy obtained by an object due to its motion.

Or mathematically, Kinetic energy =
`(1)/(2)mv^(2)`

where m = mass

v = velocity

It is given that mass of roller coaster is 12,000 kg and velocity is 30 m/s.

Therefore, calculate the kinetic energy as follows.

Kinetic energy =
`(1)/(2)mv^(2)`

=
`(1)/(2)12000 * (30)^(2)`

=
`(1)/(2)12000 kg * 900 m^(2)/s^(2)`

=
`6000 * 900 kg m^(2)/s^(2)`

=
`54 * 10^(5) kg m^(2)/s^(2)`

Thus, kinetic energy is
`54 * 10^(5) kg m^(2)/s^(2)`