Question

A car 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.

Answer 1

The speed of the car at the top of the hill is 14m/s

Step-by-step explanation:

given that

Initial velocity u of the car=0 m/s

The distance can be determined by finding out the difference between the elevation of the first slope and second slope.

elevation of the first slope=26 m

elevation of second slope=16m

distance s=26-16=10 m

acceleration due to gravity g=9.8 m/s2

speed of the car at the top of the hill can be determined by using the equation

`v^2=u^2+2as\\v^2=0^2+2* 9.8* 10\\=196\\v=√(196) =14m/s`

speed of the car at the top of the hill is 14m/s