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

  • #1

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]
 
Last edited:

Answers and Replies

  • #2
BvU
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Hello Lucas, :welcome: !

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]
 
Last edited:
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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?
 
  • #4
haruspex
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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.
 

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