Recent content by heythere1010

The force of friction is west and the traveling direction is east.

Yes, the question has given that.

Homework Statement The total work done is 2.42 * 10^4 J (work is from friction and person pulling a sled). The force of the person pulling is 135 N and the force of friction is 67 N. The angle on the sled is 48. Homework Equations W=f*d*cos0 The Attempt at a Solution I was thinking I would...

How about for the second part of finding the time?

So do I just do 400/2.5(his speed)?

I made a triangle with 2.5m/s as the hypotenuse, 1.5m/s as one of the sides. and solved for the other side. I did t=d/v (400/2=200). That's how I solved time.

The boat's speed is 2.5m/s

Yes. I calculated the angle in another part of the question. I got 53 degrees.

No.

Velocity of the current.

1.5(200)

I made a triangle with 2.5m/s as the hypotenuse, 1.5m/s as one of the sides. and solved for the other side. I did t=d/v (400/2=200).

Homework Statement A fisherman wishes to cross a river to the shore directly south of his position. The river is 400 m across, and the fisherman's boat is capable of a speed of 2.5m/s. If the river's current has a velocity of 1.5m/s [W], determine a) the time it takes the fisherman to cross...

I thought you would need to do something like conjugates for it.

If I sub in 4 from the beginning, I will get sqrt 0. I can't have that as my answer.