6. A 2.2 kg rock rests on the edge of a bridge that is 3.3 m above a river. What is the

gravitational potential energy of the rock when measured from the surface of the

river? What is the gravitational potential energy when measured from the edge of

the bridge?

Question

Physics

Oliver Harvey

15 March, 17:53

6. A 2.2 kg rock rests on the edge of a bridge that is 3.3 m above a river. What is the

gravitational potential energy of the rock when measured from the surface of the

river? What is the gravitational potential energy when measured from the edge of

the bridge?

+5

Answers (1)

Know the Answer?

Gage Brennan · Answer 1

Answer: 71 J

Explanation: The formula for gravitational potential energy is Epg = mgh.

So you plug in 2.2 as m, 3.3 as h and 9.81 as g. Once you do that you should get an answer of 71.2206. But because there are only two significant digits in the question, your answer must also have two significant digits.

6. A 2.2 kg rock rests on the edge of a bridge that is 3.3 m above a river. What is thegravitational potential energy of the rock when measured from the surface of theriver? What is the gravitational potential energy when measured from the edge ofthe bridge?

6. A 2.2 kg rock rests on the edge of a bridge that is 3.3 m above a river. What is the

gravitational potential energy of the rock when measured from the surface of the

river? What is the gravitational potential energy when measured from the edge of

the bridge?