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HELP NEED ANSWER 35 POINTS!!!! 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)
A. 800 kg
B. 7,840 kg
C. 8,000 kg
D. 78,400 kg

Respuesta :

Mass of roller coaster = 800 kg


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
Heather

Answer: A. 800 kg

Step-by-step explanation:

      They give us all that we need. First, the formula. PE = mgh;

(PE) Potential energy is 235,200 J

(h) Height is 30 m

(m) We are finding the mass

(g) The gravitational constant is about 9.81 m/s²

   After plugging into the given formula and solving for m, we get:

A. 800 kg

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