Instantaneous Power (Mastering Physics)

[ren0x]

Homework Statement

Let us now consider several questions that include numeric data.

A sled is being pulled along a horizontal surface by a horizontal force F of magnitude 600 N. Starting from rest, the sled speeds up with acceleration 0.08 m/s² for 1 minute.

Find the instantaneous power P created by force F at t=10s.

Express your answer in watts to three significant figures.

Homework Equations

P_avg = \frac{\Delta W}{\Delta t}
P = \frac{dW}{dt}

The Attempt at a Solution

I have solved for velocity after 10s.

v = 0.8 m/s

I'm stuck at where to go from here.

 

[Mattowander]

Do not forget that Power can also be expressed as P = Fv

 

[ren0x]

Do not forget that Power can also be expressed as P = Fv

If I'm not mistaken, that is the formula for P_avg. I am trying to solve for the instantaneous power, unless you know something I don't.

 

[Mattowander]

I believe that the equation would hold if you used the instantaneous force and the instantaneous velocity ( which you already found ).

That is what I found here : https://www.physicsforums.com/showthread.php?t=228937

Hope that helps.