Question

A 500 kg roller coaster car pauses at the top of a 40 m hill before rolling without friction to the bottom. Determine the speed of the car at the bottom of the hill

Answer 1

v = 28 m/s

Step-by-step explanation:

Since energy is conserved:

Eg = Ek

mgh = 1/2mv^2

masses cancel

gh = 1/2v^2

(9.8)(40) = 1/2v^2

(2)(40)(9.8) = v^2

v = sqrt(784)

v = 28 m/s