Question

Help please!

Answer 1

A roller-coaster car starts at a height of 90 m at Point A and is moving at a speed of 20 m/s on a later hill at Point C. Assuming friction does not affect the motion of the car, what is its height at Point C?
20 m

90 m

70 m

100 m

Answer 2

@jack74557 can you help with this one?

Answer 3

@Directrix @TheEdwardsFamily

Answer 4

use energy conservation assume potential energy at 90m as mg(90) and kinetic energy as 0 and at point C..KE to be 1/2 m V^2 + mgh
equate both the equations and get h