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

A man of mass 70kg rides a bicycle of mass 15kg at a steady speed of 4

  • Thread starter Doubell
  • Start date
  • #1
29
0

Homework Statement



a man of mass 70kg rides a bicycle of mass 15kg at a steady speed of 4 ms-1 up a road which rises 1.0 m for every 20m of its length. what power is the cyclist developing if there is a constant resistance to motion of 20N

Homework Equations



(P= F*V) , ( p= W/t)

The Attempt at a Solution

 

Answers and Replies

  • #2
Delphi51
Homework Helper
3,407
10


I suggest you work with a distance of 20 m. Figure out the height and potential energy gained over that distance. Figure out the time it takes to go 20 m. Then you will be in a position to use one of your power formulas.
 

Related Threads on A man of mass 70kg rides a bicycle of mass 15kg at a steady speed of 4

  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
2
Views
1K
Replies
1
Views
563
  • Last Post
Replies
6
Views
5K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
6
Views
3K
  • Last Post
Replies
2
Views
2K
Replies
20
Views
1K
Replies
0
Views
1K
Top