Question

A computational model predicts the maximum kinetic energy a roller coaster car can have given its mass, the speed at the highest point of its journey, and the height of the highest point.

The mass is 250 kg, and the highest point of the journey is at 30 m, where the cart is at rest. What is its maximum kinetic energy?
73,500 J
468,750 J
0 J
112,500 J

Answer 1

73,500 J

Step-by-step explanation:

100% Correct

Answer 2

kinetic energy = 112,500 J

Step-by-step explanation:

Given:

Mass m = 250 kg

Final velocity v = 30 m/s

Find:

kinetic energy

Computation:

kinetic energy = 1/2[mv²]

kinetic energy = 1/2[(250)(30)²]

kinetic energy = 1/2[225,00]

kinetic energy = 112,500 J