Question

A roller coaster with a potential energy of 235,200 J sits at the top of a 30 m high hill. What is the mass of the roller coaster? (Formula: PE = mgh) 800 kg 7,840 kg 8,000 kg 78,400 kg

Answer 1

Answer:

Mass of roller coaster = 800 kg

Explanation:

Formula Used:- P.E =mgh

g=9.8 m/s^2

h=30 m.

P.E.=235,200

therefore, 235200= m*9.8*30

or, m= 235200 / 9.8*30

or,. m= 235200 / 98*3

or,. m=78400 / 98

or,. m= 800 kg

Answer 2

Answer:

The answer is 800

Explanation: