Question

What is the kinetic energy of a roller coaster car that has a mass of 482kg that is descending feom the highest peak of the coaster which is known to be 75m tall and has a velocity of 37.9 m/s? The gravitational acceleration is 9.81 m/s^2. Must show all work, correct sig figs, and include correct units.

Answer 1

Answer: 346174.8 joules

Explanation:

Kinetic energy is the energy possessed by a moving object. It is measured in joules.

Kinetic energy = 1/2 x Mass x Velocity^2

Since mass of rollercoaster = 482kg

velocity = 37.9 m/s

Then, K.E = 1/2 x 482kg x (37.9 m/s)^2

= 0.5 x 692349.62

= 346174.81 joules

Thus, the kinetic energy of the descending rollercoaster is 346174.8 joules