A 150kg roller coaster SITTING ON THE TOP OF A 200M HILL HAS HOW MUCH POTETNTIAL ENERGY

Epot = 294300 [J]

Explanation:

Potential energy is defined as the product of mass by height by gravitational acceleration. The height is measured with respect to the reference level. At this reference level the potential energy is equal to zero.

where:

m = mass = 150 [kg]

g = gravity acceleration [m/s²]

h = elevation = 200 [m]

that would be because of both gravity and friction. so     c