Work and kinetic energy

  • #1
A hockey puck of mass m sits on a frictionless, horizontal table tied to a string of length L. The puck starts at rest, and accelerates to some speed v moving in a horizontal circle of radius L. The net work done on the hockey puck,depend on what? L,m,or r??

i forgot the formula for the circular motion.
 

Answers and Replies

  • #2
130
0
acceleration = velocity^2 / radius
net force = mass*velocity^2 / radius
 
  • #3
9
0
Work done is force x displacement.
 
  • #4
Doc Al
Mentor
45,248
1,596
Hint: Consider the Work-Energy theorem.
 

Related Threads on Work and kinetic energy

Replies
4
Views
14K
  • Last Post
Replies
3
Views
747
A
  • Last Post
Replies
1
Views
817
  • Last Post
Replies
4
Views
6K
  • Last Post
Replies
1
Views
768
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
1
Views
4K
  • Last Post
Replies
1
Views
866
Top