Recent content by Benny851

I have a question about the equation for work as it pertains to electrostatics and electricity. One book I read says equation for work done by electric field is W=qV, but another book says W=-PE. However, when I try both equations for the following problem I get different answer. Could someone...

yes, I understand area*height = volume, but I do not know either area or volume, so I do not see how that formula can help me. Can you please be a little more straightforward in your responses. I understand you want me to learn it on my own, but time is of the essence.

Can someone please help me with this problem?

how so? Can you please elaborate

How does that help this person solve the problem? You don't know V or P. You only know R. I am working on a similar problem and am also stuck. A little help would be much appreciated!

How does amount of water give me a relationship between area and distance? I do not see how the mass of the water can help. it can give me the volume because I am also given the density. But I do not see how even the volume can help me find a relationship between area and distance. Can someone...

Homework Statement There are 2 parallel plates of unknown area. The area between the 2 plates is completely filled with 150 kg of water. The capacitance is .3 mirofaradays. K of water is 120 and had density of 1000 kg/m^3. Also Eo = 9.1 x 10^-12 C^2/(NxM^2). Determine the distance between...

I am a little confused still. I have calculated the original distance between 2 and 3 before 3 starts to move from the right. Does 2 start to move at same time 3 starts to move, if so then the original starting distance is the distance from 2 that I am solving for.

I see what you mean. So the force acting on 2 is equal to the frictional coefficient*(mg + force of 1 acting on 2), right. I'm thinking I use the conservation of energy equation to determine how far 3 is from 2 when 2 starts to move, is that right?

Homework Statement There are three point masses. 1 is fixed in space with the 2nd point mass directly below it on the ground. The 3rd point mass is an unknown distance to the right of mass number 2. These 3 point masses for a rt triangle with point 2 at the 90 degree angle. The vertical...

Homework Statement A billiard ball ( mass = 10kg, initial velocity is 5 m/s) is launched along x-axis at a stationary billiard ball ( mass = 5kg). After collision, the first ball goes off at 30 degree angle above x-axis and 2nd ball goes off at 45 degree angle below x-axis. Calculate the...

which direction is the force acting on the box? I don't get what 'above horizontal means'? I assume the force is pointed downward at the top left corner of the box.

OK, so please tell me if I am heading in right direction. The equations I have so far are as follows: 1. N = Fsin theta + MG 2. Fcos theta = MsN Now all I need to do is solve for F and that will be my answer to part A, right?

The problem is I don't know how to draw the force acting on the box. Is the force coming up from ground or going down onto the box from top left? No picture was supplied with problem

Homework Statement A man wants to push a cardboard box 60 kg along a floor by applying force F in a direction 40 degrees above horizontal. Coefficient of static friction between box and floor is .7. a) Determine F if box is on verge of moving. b) Based on part A, determine acceleration...