1. Sep 15, 2005 #1

   DaRotot

   

   A 2.3-kg block slides down a plane (inclined at 43degrees with the horizontal) at a constant speed of 3.3 m/s. At what rate is the frictional force doing work on the block?

    

   DaRotot, Sep 15, 2005
2. 
   Phys.org - latest science and technology news stories on Phys.org

   • • Scarlet macaw DNA points to ancient breeding operation in Southwest
   • • Mathematicians solve age-old spaghetti mystery
   • • New technology can detect hundreds of proteins in a single sample
3. Sep 15, 2005 #2

   Nylex

   

   The rate of doing work is just the power. Do you know an expression relating power and velocity? You'll also need the frictional force, but you should be able to get it because you're told that the block is travelling at a constant speed..

    

   Nylex, Sep 15, 2005
4. Sep 15, 2005 #3

   Dr.Brain

   

   ..and also the work done will be negative , since the direction of the frictional force is opposite to the displacement direction.
   
   BJ

    

   Dr.Brain, Sep 15, 2005

• Log in with Facebook
• Log in with Twitter

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in