Recent content by 33639

I've made a simple DC motor like this image: http://farm4.static.flickr.com/3156/2864655414_234d5d3207.jpg I'm just confused why initially when i increase the number of loops (about 15) it spins faster.But after this limit the speed of the rotor is no longer as fast as it was before. Why...

Hi there Currently in my physics class my teacher has assigned us a project where we are to make a DC motor using these items: 2 thumbtacks 1 meter of 14 AWG copper wire 2 paperclips A block of wood 1 ceramic magnet 1 AA battery 2 connecting wires My plan is something like this...

Do you also include that in the FBD diagram for the 3kg block? Because i though it was already accounted for by the 2kg block? What would Fnet now be equal to to find Tension?

I'm having difficulty with this question In the diagram, the coefficient of kinetic friction between the 2.00 kg and the 3.00 kg blocks is 0.300. The horizontal surface and the pulleys are frictionless, and the masses are released from rest. (a) Draw a free body diagram of each block...

Hey! I'm having some problems with this question: An electric winch is used to raise a 40-kg package and a 10-kg package vertically up the side of a building as pictured in the diagram. The magnitude of the frictional force acting between the wall and the 40-kg package is 60N. The angle the...

I'm just confused with how can I find the speed of the bullet as it's traveling down. I know in the x component v = 275 and in the y component d = 3000 and a = -9.8

I'm having problems with this question. I don't know how to solve it...I've usually solved questions with some sort of resistance force but this I don't know how to solve. How would I solve this question? 1. The problem A bomber flies horizontally with a speed of 275 m/s relative to the...

Hmm right it wouldn't be constant 25 because its accelerating. this formula has d, v, t, a d= vt + 1/2at2

I'm not entirely sure i understand what you are asking but would this expression be 25 = vt ??...

Hi! I'm have difficulty with this question. If anyone can help it would be a lot of help. Problem Raj is late for the bus, and as he closes the door to his house, he notices the bus, located 25m away, has begun to accelerate away from him at 1.0 m/s2. Raj begins to chase the bus immediately...

Thanks a whole lot. I'm not sure if this is right but this is how i solved the question :D equation: 1) tr + ts = 6.9s 2) d = (8.3)tr + 1/2 (9.8)(tr2) 3) d = 330ts Solution: (8.3)tr + 1/2 (9.8)(tr2) = 330ts (8.3)tr + 1/2 (9.8)(tr2) = 330 (6.9 - tr) (8.3)tr + 1/2 (9.8)(tr2) = 2277 -...

Complex physics kinematics problems help! I'm having difficulty with these physics problems. I would really appreciate it if someone could help me. Homework Statement 1) Steven throws a rock off a cliff, giving it a velocity of 8.3 m/s [down). He heard the splash when the rock hit the...