Acar on a roller coaster starts at zero speed at an elevation above the ground of 26 m. it coasts down a slope, and then climbs a hill. the top of the hill is at an elevation of 16 m. what is the speed of the car at the top of the hill? neglect any frictional effects. a) 9 m/s b) 18 m/s c) 14 m/s d) 6 m/s e) 10 m/s

option (c)

Explanation:

h1 = 26 m

h2 = 16 m

Let the speed of the car is v.

Use the law of energy conservation

Potential energy at initial point = Potential energy at final point + Kinetic energy at final point

m x g x h1 = m x g x h2 + 1/2 x m x v^2

9.8 x 26 - 9.8 x 16 = 0.5 x v^2

196 = v^2

v = 14 m/s

i just did an experiment like this in my science class. also the answer is yes, it will get separated because they are two opposites meaning if they are opposite they can not attract.

hope this .!