04 Mar '10 04:162 edits

I'm just stuck on a problem

the problem is asking for the power supplied by the motor at a certain time t.

The force the motor supplies is a function of time

F = F(t)

and

P = Fv

am I in the right ballpark for logic

F(t) = ma

a = F(t)/m = dv/dt

v= Int[(F(t)/m)dt] = v(t)

Then P(t) = v(t)* F(t)

??

The problem incorporates some pulleys and friction, but I didn't want to go into that if my logic is flawed from the get go.

the problem is asking for the power supplied by the motor at a certain time t.

The force the motor supplies is a function of time

F = F(t)

and

P = Fv

am I in the right ballpark for logic

F(t) = ma

a = F(t)/m = dv/dt

v= Int[(F(t)/m)dt] = v(t)

Then P(t) = v(t)* F(t)

??

The problem incorporates some pulleys and friction, but I didn't want to go into that if my logic is flawed from the get go.