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

it should be -8.6 cm hope this out

it takes about 30 days for it to break down