Calculating Max Speed of a Car on a Horizontal Road

[Kararr]

1. "A car moves along a horizontal road against a resistance of 400 N. What is the greatest speed in kph that the car can reach if the engine has a maximum power of 16.0 kW?"

Homework Equations

:
P= W/change in time
P= F x v (dot product)
Please help ):
[/B]

 

[NascentOxygen]

W = F x v
is not correct

x is not the sign for a dot product
x is the cross product

 

[Kararr]

W = F x v
is not correct

x is not the sign for a dot product
x is the cross product

Sorry didn't know how to put the dot symbol that's why I put it in parentheses whoops

 

[NTW]

Besides, work is not force times velocity...

 

[NascentOxygen]

didn't know how to put the dot symbol that's why I put it in parentheses whoops

The symbol mistake was incidental. The major problem is your formula W = F v
is not a valid formula. What formula for work does your textbook use?

 

[Kararr]

Besides, work is not force times velocity...

Edited: it's power=fv.

 

[Kararr]

The symbol mistake was incidental. The major problem is your formula W = F v
is not a valid formula. What formula for work does your textbook use?

Edited, p=fv

 

[NascentOxygen]

So, can you use that equation to determine the "greatest speed" as the problem statement asks?