Wednesday
June 19, 2013

# Posts by Tim

Total # Posts: 797

physics
Yes. However, I think I hit a wrong number on my calculator before. I still get around 142.6, though.

physics
Sorry I let my friend use my laptop and he must have typed in his into Jiskha. It's still Tim. Sorry for the confusion.

physics
I'm also confused as to why the angle θ is 0.5981. I thought I had to use arctan(1.13/141) which gives me a 38.9 degree angle.

physics
When I try balancing the forces, I end up with T = mg, which gives me an answer which is over twice the correct answer.

physics
A trapdoor on a stage has a mass of 20.8 kg and a width of 1.58 m (hinge side to handle side). The door can be treated as having uniform thickness and density. A small handle on the door is 1.41 m away from the hinge side. A rope is tied to the handle and used to raise the doo...

Physics
I was able to figure this one out with a related question. Thank you!

Physics
A thin uniform rod (length = 1.3 m, mass = 3.2 kg) is pivoted about a horizontal frictionless pin through one of its ends. The moment of inertia of the rod through this axis is (1/3)mL2. The rod is released when it is 50° below the horizontal. What is the angular accelerat...

Trigonometry
When viewing Angel Falls (the world's highest waterfall) from Observation Platform A, located on the same level as the bottom of the waterfall, we calculate the angle of elevation to the top of the waterfall to be 69.30°. From Observation Platform B, which is located o...

Physics
A system consists of two particles. Particle 1 with mass 2.0 kg is located at (2.0 m, 6.0 m) and has a velocity of (3.1 m/s, 2.6 m/s). Particle 2 with mass 4.5 kg is located at (4.0 m, 1.0 m) and has a velocity of (1.1 m/s, 0.6 m/s). Determine the position and the velocity of ...

College Algebra
A gardener wants to fence in her plot in two equal rectangular sections. If she has 120 yards of fence and the area of the entire plot is 384 yd 2, find the possible dimensions in yards of the garden.

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