• Support PF! Buy your school textbooks, materials and every day products Here!

Potential vs. Kinetic Energy

  • Thread starter Hannah1
  • Start date
  • #1
47
0

Homework Statement


A San Francisco cable car loses its brakes and runs down a hill 30 m high. Assuming there is no friction, which of the following represents the energy changes that occurred?

a. potential energy to kinetic energy
b. kinetic energy to potential energy
c. potential energy to heat energy to kinetic energy


Homework Equations


Potential Energy - The energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors.
Kinetic Energy - Energy that a body possesses by virtue of being in motion.


The Attempt at a Solution


a. potential energy to kinetic energy


Is the correct answer a.?
 

Answers and Replies

  • #2
PhanthomJay
Science Advisor
Homework Helper
Gold Member
7,136
476
Given the choices, why do you say 'a' is correct? Please explain.
 
  • #3
47
0
Given the choices, why do you say 'a' is correct? Please explain.
At the top of the hill, while the car is parked, it has potential energy. While the car is going down the hill it has kinetic energy because it is in motion. I don't think heat energy was produced because there was no friction. So that's why I picked a. :smile:
 
  • #4
247
0
That is right ! :)
 

Related Threads for: Potential vs. Kinetic Energy

  • Last Post
Replies
6
Views
6K
Replies
4
Views
2K
Replies
3
Views
2K
  • Last Post
Replies
1
Views
1K
Replies
4
Views
943
Replies
3
Views
6K
Replies
5
Views
6K
Replies
3
Views
8K
Top