Physics

[alex17488]

Two people are pulling a boat through the water . Each exerts a force of 600 N directed at a = 20.0� angle relative to the forward motion of the boat. If the boat moves with constant velocity, find the resistive force exerted by the water on the boat. In Newtons

Lets see how fast you can do this on guys?

[jake-the-peg]

Nah tell you what lets see how fast you can do it with a few hints:

The boat's not accelerating right? so the resistive force is equal to the forward force the two men are putting on.

Lets take one of the men, he pulls at 20 degrees, so we draw the triangle and 600N is on the long side and it's 20 degrees

So a bit of trig (big hint: it's the cosine) will give you the forward force from one man.

You should be able to do the rest now

[lord molly]

duh, use SUVAT

[Peter Pedant]

The chapter you ust have been doing is
resolution of forces

if you hadnt noticed then turn to that page now

and you're gonna have to resolve 600 N throough 20 degrees - no this is not the complete answer, there is a bit more to it......the other side of the argument you might say

Hmm pity it isnt 30', pity it isnt 30 45 or 60....