wakawu

You have a rope going through 2 anchors that are secured to a wall. You apply force on each end of the rope (doesn't matter the angle which you pull). Will the rope ever be horizontal between the two anchors? See pic below for illustration..

http://i43.tinypic./ com/ael944.jpg

Determine the magnitude of the force in each member of the truss shown in the figure below. A little tricky where to begin. Obviously start with point B and I get F-Fbc cos 30 = 0

That would give you Fbc but I'm not sure if I'm supposed to use cos 30 or cos 90? Any help please? Where do I go from here?

The diagram is here >> PLEASE COPY AND PASTE IT AND REMOVE THE SPACE BETWEEN tinypic and the .COM yahoo wont let me show the link on here for some reason. thank you. http://i42.tinypic/ .com/28i930o.jpg

http://i53.tinypic./ com/155pg10.png

totally forgot where to start with this. please see pic i uploaded above

2 tensions of cable connected through a weight via another singular cable. weight at end of string is 1000lbs. lengths of cable are given.

log (base 6) x - 5log (base 6) y = 4

solve for y in terms of x.

balanced equilibrium bar see picture for details as i can't explain it here. thanks for any help i really have to get this done for tomorrow.

http://img812.imageshack.us/img812/5139/physicspro...

a typical student weighs 725N and wears shoes that touch the ground over an area of 412 cm*squared. What is the average pressure his shoes exert on the ground?

A snowmobile has a mass of 250kg. A constant force is exerted on it for 60.0s. The snowmobiles initial velocity is 6.00m/s and its final velocity is 28.0m/s.

(a) What linear impulse does the snowmobile experience?

(b) What is the magnitude of the force exerted on it?

I have an idea of where to start with (a) maybe using p=mv formula I'm a little confused about how to complete the problem

A small hoist can raise 100kg of bricks to the top of a construction project 30m above the street in half a minute. Determine the power provided.

I'm a little confused how to start this problem but here is what I got so far. Did I go about this right at all?

t = 30s, m = 100kg, a = 9.81

I used formula V(final)*2 = V(initial)*2 - 2(g)y

V(final) = 24.26 m/s

a = {V(f) - V(i)} / t = 0.8086 s

F=ma = 100(0.8086) = 80.8N

P=W/t so is it {80.8(30)} / 30 = 80.8 W ??

A 1200kg car coasts on a horizontal road with a speed of 20m/s. After crossing a sandy stretch of the road 30.0m long its speed decreases to 17m/s.

(a) how much work is done on the car?

(b) find the magnitude of the average force on the car

Do you use the 1/2 mv*2 formula and subtract to find work? I'm beginning this chapter in physics and don't understand this problem fully.