A roller coaster with a mass of 20kg sits at the top of a 30 m high hill. What is the Potential energy of the roller coaster? (Formula: PE=mgh)
(g= 9.8m/s)

Explanation:

The potential energy of a body can be found by using the formula

PE = mgh

where

m is the mass

h is the height

g is the acceleration due to gravity which is 9.8 m/s²

We have

PE = 20 × 30 × 9.8

We have the final answer as

Hope this helps you

the correct answer is option d

explanation:

i was wrong its d because they dont use cm when calculating square roots

no, the red giant is the hottest with 2.00.000.000 degrees celsius. while the white dwarf only 25,000 degrees celsius.