Weight, work, and horsepower

  • Thread starter rm121181
  • Start date
  • #1
1
0

Homework Statement


If weight x distance over time equals work done. Work done divided by time will give me work done over time foot pounds. Foot pounds can be converted to horsepower. So I should be able to find minimum horse power needed to push
a known weight a known distance in a known time right? Am I missing something? It seems like my horsepower needed numbers are very high.


Homework Equations




The Attempt at a Solution

 

Answers and Replies

  • #2
963
213
If weight x distance over time equals work done. Work done divided by time will give me work done over time foot pounds. Foot pounds can be converted to horsepower. So I should be able to find minimum horse power needed to push
set up the problem

a known weight a known distance in a known time right? Am I missing something? It seems like my horsepower needed numbers are very high.


horse-power
; is an unit of power equal to 550 foot-pounds per second (about 750 watts).
 
  • #3
haruspex
Science Advisor
Homework Helper
Insights Author
Gold Member
34,857
6,126
weight x distance over time equals work done
No, weight x distance = work done; dividing that by time gives power.
work done over time foot pounds.
No idea what that means. The work done over the time a runner's foot pounds the pavement?
Foot pounds can be converted to horsepower.
No, foot pounds is a measure of work, not power.
 
  • #4
CWatters
Science Advisor
Homework Helper
Gold Member
10,529
2,297
If weight x distance over time equals work done.
Only if the distance is vertical. The correct equation is..

Work = force * displacement

So I should be able to find minimum horse power needed to push
a known weight a known distance in a known time right?
No because the force required to move an object is not equal to the weight. For example the force might depend on friction, rolling resistance, air resistance etc some of those might be effected by weight but it might not be a simple relationship.
 

Related Threads on Weight, work, and horsepower

  • Last Post
Replies
5
Views
7K
Replies
1
Views
1K
  • Last Post
Replies
2
Views
1K
Replies
5
Views
618
  • Last Post
Replies
2
Views
4K
  • Last Post
Replies
2
Views
777
  • Last Post
Replies
7
Views
4K
Replies
3
Views
6K
Replies
5
Views
7K
  • Last Post
Replies
2
Views
7K
Top