Answer:
B. 0 m/s
Explanation:
Given parameters:
Mass of roller coaster = 800kg
Height = 0
Mechanical energy at highest point = 165800J
Unknown:
Velocity = ?
Solution:
The mechanical energy is the sum of the potential and kinetic energy within a give system.
At the highest point, the velocity of the roller coaster will be zero.
All the kinetic energy would have been transformed into potential energy.
So, the velocity is 0m/s
