Net forces on a boat (propulsion, water and air resistance)

[lucas pentland]

Homework Statement

A 4000 kg motor boat experiences a resistance force of 2500 N from the air and a 3200 N force of resistance from the water. If the motor provides a forward force of 6000 N, what is the net force acting on the boat

Relevant Equations

I'm not sure.

2500 N [south] + 3200 N [south] = 5700 N [south]
5700 N [south] - 6000 N [north] = 300[north]

 

[BvU]

Hello Lucas, !

Does your calculator have fresh batteries ?

[edit] looks a bit weird now. Was intended as a hint to check the math when

2500 N [south] + 3200 N [south] = 8700 N [south]

 

[Lnewqban]

Welcome!
How can the motor encounter a magnitude of resistance to the movement that is greater than the magnitude of the forward force that it produces?

 

[haruspex]

Homework Statement:: A 4000 kg motor boat experiences a resistance force of 2500 N from the air and a 3200 N force of resistance from the water. If the motor provides a forward force of 6000 N, what is the net force acting on the boat
Relevant Equations:: I'm not sure.

2500 N [south] + 3200 N [south] = 5700 N [south]
5700 N [south] - 6000 N [north] = 300[north]

Your edited version is correct.