Which Situation Describes A System With Decreasing Gravitational Potential Energy?
1) a girl streching a horizontal spring
2)a bicyclist riding up a steep hill
3) a rocket rising vertically from earth
4) a boy jumping down from a tree.
please help
3 Responses to “Which Situation Describes A System With Decreasing Gravitational Potential Energy?”
Leave a Reply
Posts
- Category: Alternative energy
- 4 Reliable Suppliers Of Alternative Energy
- Alternative Energy and Benefits
- Alternative Energy Consultants
- Alternative Energy Development NREL Activities Exposed
- Alternative Energy Facts Expert Views Revealed
- Alternative Energy In Ireland How The Irish Use Alternative Sources Of Energy
- Alternative Energy Jobs What Prospective Employees Can Expect
- Alternative Energy Research And Development University Activities Revealed
- Alternative Energy Solutions for the Home
- Alternative Energy Types How They Are Utilized Today
- Alternative Energy Usage in Ireland
- Alternative Energy What Types of Alternative Energy are Available
- ampquotalternative Energy Sourcesampquot System © is it Affordable
- An Investment in Alternate Energy Mutual Funds is an Investment in the Future of the Earth
- Are Alternative Energy Companies the New Wave in industry
- Educating People About Alternative Energies
- Educating People About Alternative Energies
- Finding Safer Alternative Energy Reasons For Its Urgency
- Getting A Job In The Alternative Energy Field
Plugin by dagondesign.com
4
Gravitational potential energy is can simply be described as how far down you’ll fall. 1 isn’t changing at all. 2 and 3 are increasing. In 4, the boy is returning to the ground. He’s spending all of his gravitational potential energy and therefore decreasing how much he has.
4) a boy jumping down from a tree
Let me explain
For a girl stretching a horizontal spring, the fact that the spring is horizontal and is not moving away from Earth keeps an equal gravitational potential energy.
For a bicyclist riding up a steep hill, because you are moving further away from the Earth, there is a larger gravitational potential energy because you can fall further if you were in the air.
For a rocket rising vertically from the Earth, same as above.
Now a boy jumping down from a tree is getting closer to the Earth, so his gravitational potential decreases.
Answer is 4 – boy jumping down from a tree. Gravitational potential energy is being lost, and converted to kinetic energy as the boys velocity increases, heading for the ground, faster and faster… OMG SPLAT!!!! Too bad – so sad.