00:02
From the conservation of energy, we know that the initial sum of kinetic energy and potential energy will be concerned or will be equal to the final sum of kinetic energy and potential energy in this roller coaster problem.
00:21
Now, we know that the initial velocity is zero since the car is starting from rest.
00:30
The value of ui is mghi, sorry, mg hi.
00:38
This is the standard formula m g times the height.
00:42
Initially we are assuming that the object is at height h.
00:46
G is the acceleration due to gravity and m is the mass of the car.
00:51
Now, final velocity can be denoted by vf, hence the final kinetic energy can be written like that.
01:01
Now the final potential energy can be written like that.
01:07
Here hf is final height...