Recent content by neoncrazy101

When I first read your post I thought it made sense, and it does but I can't seem to get it to work. Any other advise or information to push me on?

Homework Statement A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.127 rad/s2. After making 2790 revolutions, its angular speed is 155 rad/s. (a) What is the initial angular...

.1 seconds. OH! I think I got it thanks. So I take the 1000/2pi to get the 159.xxx and then do 1/159 = .0062893 and round to get .0063. thanks!

T=(2pi(r))/V ?

Homework Statement Some bacteria are propelled by motors that spin hair-like flagella. A typical bacterial motor turning at a constant angular velocity has a radius of 1.8x10-8m, and a tangential speed at the rim of 1.8x10-5 m/s. (a) What is the angular speed (the magnitude of the angular...

Homework Statement The drawing shows a collision between two pucks on an air-hockey table. Puck A has a mass of 0.0180 kg and is moving along the x-axis with a velocity of +7.71 m/s. It makes a collision with puck B, which has a mass of 0.0360 kg and is initially at rest. The collision is not...

Homework Statement Starting from rest, a 98-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 780 N, and his speed at the bottom of the pole is 3.4 m/s. How far did he slide down the pole?Homework Equations Not sure? Maybe, Wwc =...

The difference in PE between A and B is 49.116032. I'm probably very very confused (most likely, brain is fried plus headache) but if I take that 49.116032 and multiply it by the 7.64m then I come with up 375.2 which is really large. EDIT: I figured it out! W=162.50248 (roughly) and then F =...

Homework Statement A projectile of mass 0.656 kg is shot straight up with an initial speed of 25.4 m/s. (a) How high would it go if there were no air resistance? (b) If the projectile rises to a maximum height of only 7.64 m, determine the magnitude of the average force due to air...

Oh. that's works. I totally thought that it was supposed to be -9.8. thanks. Now I'm getting -2100.

Ok, that was one mistake but I must of done something else, I still get the wrong answer. Final: 1/2(71.2)(4.41)2+(71.2)(-9.8)(1.06) = -47.27324 Initial: 1/2(71.2)(9.96)2+(71.2)(-9.8)(0) = 3531.57696 Ef - Eo = -3578.85284 The answer is supposed to be -2100J. Must be something else...

Homework Statement A 71.2-kg skier coasts up a snow-covered hill that makes an angle of 31.4 ° with the horizontal. The initial speed of the skier is 9.96 m/s. After coasting a distance of 2.04 m up the slope, the speed of the skier is 4.41 m/s. (a) Find the work done by the kinetic frictional...

alright thanks but one question, I am not familiar with the w looking thing nor the 2n. What are they?

The question is... A satellite is in a circular orbit about the Earth (M = 5.98 x 1024 kg). The period of the satellite is 6.72 x 104 s. What is the speed at which the satellite travels? I know the speed is equal to (2piR)/6.72x10^4s But I can't figure out the radius. I know the Earth's...

Homework Statement A person in a kayak starts paddling, and it accelerates from 0 to 0.735 m/s in a distance of 0.400 m. If the combined mass of the person and the kayak is 76.0 kg, what is the magnitude of the net force acting on the kayak? Homework Equations F=Ma (?) The Attempt...