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

Average Force

  • Thread starter Rawpcgamer
  • Start date
  • #1
Part 1.) 1.35g bullet leaves the barrel of the gun going 270m/s. What is its kinetic Energy?
-I converted 1.35 g to kg = 0.00135g
-I arrived with an answer of 49.2075 J

Part 2.) If the length of the barrel of the gun described above is 35cm, find the average force exerted on the bullet to move it the length of the barrel.



What I had attempted to do is Mass X Velocity/ 35 cm
-im not sure if thats the way to find avergae force, because other examples ive seen its divided by time.

thank you for looking at this for me
 

Answers and Replies

  • #2
rock.freak667
Homework Helper
6,230
31
You know the total energy is the kinetic energy right? The work done by a force is just force*distance.
 
  • #3
im sorry, i understand what your saying but i need an thorough explanation
 
  • #4
rock.freak667
Homework Helper
6,230
31
im sorry, i understand what your saying but i need an thorough explanation
If you assume no losses due to friction, then by conservation of mechanical energy, shouldn't the work done = change in kinetic energy?
 

Related Threads on Average Force

Replies
4
Views
2K
  • Last Post
Replies
2
Views
3K
  • Last Post
Replies
1
Views
4K
  • Last Post
Replies
2
Views
7K
  • Last Post
Replies
5
Views
920
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
7
Views
2K
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
1
Views
754
  • Last Post
Replies
2
Views
925
Top