Aroller coaster has a mass of 275 kg. it sits at the top of a hill with height 85 m. if it drops from this hill, how fast is it going when it reaches the bottom? (assume there is no air resistance or friction.)

Explanation:

Given that,

Mass of the roller costar, m = 275 kg

It sits at the top of a hill with height 85 m, h = 85 m

We need to find the speed with which it is going when it reaches the bottom. It can be calculated using the conservation of energy as :

g is the acceleration due to gravity

v = 40.81 m/s

So, the speed of the roller coaster when it reaches the bottom is 40.81 m/s. Hence, this is the required solution.

what are the options.

explanation:

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d