Recent content by DLPhysics

I figured out the problem on my own! Ahh, it was simpler than I thought it would be.

Homework Statement Three cubes, of side l, 2l, and 3lo, are placed next to one another (in contact) with their centers along a straight line and the l = 2lo cube in the center. What is the position, along this line, of the CM of this system? Assume the cubes are made of the same uniform...

Fg acts down on the sled while Fn keeps the sled on the ground. Ffr acts to the right because I assume she is moving to the left. However, is the hill at an angle? I think it is, but if it is, I don't know how to find the angle. PLEASE, SOMEBODY HELP!

I also know that there is acceleration involved at some point, but I don't know how long it took her to decelerate from 6.2 m/s to 0 m/s. I'm REALLY FRUSTRATED at this point because whenever I setup Force and Kinematic equations, I'm always missing TWO variables. I would like someone to HELP me...

I think that I need the angle of the hill she is sliding down to find out the acceleration because I certainly think that she is sliding down the hill, and I know that friction affects her motion.

Homework Statement A 72 kg person escapes from a burning building by jumping from a window 30 m above a catching net. The acceleration of gravity is 9.81 m/s2. Assuming that air resistance is simply a constant 88 N force on the person during the fall, determine the person’s velocity just...

Homework Statement A girl coasts down a hill on a sled, reaching level ground at the bottom with a speed of 6.2 m/s. The coefficient of kinetic friction between the sled’s runners and the hard, icy snow is 0.059, and the girl and sled together weigh 736 N.The acceleration of gravity is 9.81...

Thanks for the help! I greatly appreciate it! Damion

Vy=10.55380643 m/sec (I did this before, but the HW said that it wasn't the vertical component of the velocity of the rock when it struck the ground a = 9.8 (positive because the rock is falling) Viy = ? Vf = Vi + at Vf = 0 + (-9.8)(6.369258724) Vf = -62.418973549 h = Viy (time) +...

I believe the seventh root of -128 is -2, so the factor would be (x + 2), so use synthetic division to see what you have left, then work from there.

Homework Statement A rock is projected from the edge of the top of a building with an initial velocity of 18.4 m/s at an angle of 35◦ above the horizontal. The rock strikes the ground a horizontal distance of 96 m from the base of the building. The acceleration of gravity is 9.8 m/s2 ...