# Recent content by NJDevilsFan26

1. ### Civil vs Mechanical Engineering - Structural

Alright, cool. Thanks.
2. ### Need Help on Electric Potential

Hey, So I pretty much don't understand why certain concepts work when dealing with electric potential. Suppose we have an infinite plane with some positive charge density, and the magnitude of the E field at an distance z from the plane is defined as E = (σ)/(2ε) (so the field is uniform...
3. ### Civil vs Mechanical Engineering - Structural

Hey, I am currently a sophomore Civil Engineering student, however I'm not sure whether I should be studying civil or mechanical (based off what I want to get into). Basically, I want to specialize at some point in the structural aspect, however, I know each field branches off into this...
4. ### Forces problem involving rotational motion.

A cord is wrapped around the rim of a solid uniform wheel 0.240m in radius and of mass 8.80kg. A steady horizontal pull of 30.0N to the right is exerted on the cord, pulling it off tangentially from the wheel. The wheel is mounted on frictionless bearings on a horizontal axle through its center...
5. ### Few Conceptual questions regarding Rotational Motion.

Listed below are just a things I cannot figure out involving rotational motion (one involves a situation). -Why does Kinetic Friction do no work if bodies roll without slipping? I thought it would add torque to provide more energy for rotational motion. Situation: A solid bowling ball...