A roller coaster cart of mass m = 362 kg starts
stationary at point A, where h1 = 20.3 m and
a while later is at B, where h2 = 9.8 m.
The acceleration of gravity is 9.8 m/s2 .
What is the potential energy of the cart
relative to the ground at A?
Answer in units of J

Question

A roller coaster cart of mass m = 362 kg starts
stationary at point A, where h1 = 20.3 m and
a while later is at B, where h2 = 9.8 m.
The acceleration of gravity is 9.8 m/s2 .
What is the potential energy of the cart
relative to the ground at A?
Answer in units of J

loser66 · Answer

potential energy  PE = mgh 
at A, h = 20.3
         m = 362
          g = 9.8
so PE = 7.2 * 10^4 J