Recent content by Power of One

1.In a television set, electrons are accelerated from rest through a potential difference in an electron gun. They then pass through deflecting plates before striking the screen. (a) Determine the potential difference through which the electrons must be accelerated in the electron gun in order...

Homework Statement A ladder 12.0m long weighing 125 N rest against a smooth vertical wall. The bottom of the ladder makes an angel of 67 with the deck. A bucket of paint with a mass of 14kg rests o a rung, 7.00m from the bottom end of the ladder. What is the frictional force exerted on the...

How does the gravitational force used to find the time? I still don't understand number 2, can someone explain it again?

Homework Statement 1. Given the mass of Pluto and the sun, and the distance between the two, how would you find how many Earth years are in a Pluto year? 2. A bird flying over you drops a walnut. If the bird is flying horizontal at an altitude of 23.5m, and the walnut travels a horizontal...

3. Since TA is greater than TB, TA/TB >1, right?

Homework Statement Homework Equations F=ma w=mg The Attempt at a Solution 1. I don't understand it at all. 2. F of M: T=9.8M Fx of m: TB x= TA x Fy of m: TB y + TB y= Fg (TB y + TB y= 9.8m) I don't know what to do from here. 3. TA> TB That's all I understood. Any...

Homework Statement 1. An 85 g wooden block is set up against a spring. The block is pushed into the spring, compressing it a distance of 2.0cm and then released. k= 78N/m. What is the speed of the block when it reaches its initial point. 2. A 5.0kg crate slides down a smooth ramp that is...

I think I understand it now. Thank you very much for being so patient with me. :]

I forgot that it was a vector. xD Is this how you would compute that though? Are my calculations correct?

I understand what you are saying. Let me try using numbers to see if I really understand it. GOING UP AGAINST GRAVITY w= F delta x cos0 F=ma a= 9.8 m/s^2 m= 50 kg delta x= 3m angle=0 W= (9.8 x 50) (3) cos 0 W= 1470 J GOING DOWN WITH GRAVITY w= F delta x cos0 F=ma a= -9.8...

I really appreciate your help, but I'm really slow, so I apologize. So what you are saying is that I worked to get up the stairs, but when I go down my work becomes 0? Oh and Iwhat I meant was that your post and lubuntu's post contradicted each other because she said there was an acceleration...

Your responses contradict each other. Is there an acceleration or not? @FoxCommander- Are you saying that my displacement would be 0? How is it zero if I did not end up at the same spot as I started? Why wouldn't the displacement be the distance between the ground (starting point) and the...

Since Work= F displacement cos theta. If a person runs up a flight of stairs and then back with a constant velocity, does that mean his acceleration is also 0. If that's the case is the person's force 0, making his work also 0. This doens't make sense to me. Or is acceleration, one due to...

I don't understand what you mean by that. Can you please explain it a bit further?

Homework Statement 1. A baseball player hits a homerun and the ball is caught by a person in the stands. It is caught 7.50m above the point it was hit. At the moment it was caught, it has a velocity of 36.0m/s at an angle of 28 degrees below the horizontal. What was the initial velocity...