Recent content by sand

Thanks

Hi. I'd like to ask a question about this. In setting up the equations 2 and 3, I don't really get why the signs of the terms are what they are. For example, in equation2), 20i1 was positive but 5i2 was negative. And then in equation 3 they are both negative. When I had a go at this from...

Thanks. That was helpful. My understanding of this side of Physics isn't very good so I'm sorry if my questions aren't well worded.

Hi. I'm new but I wanted to clarify something in Coz's working. It looks like they used the electrostatic force of the LHS for the force in F=mg. But is that right? or should it be the difference between the LHS and the RHS? But that leads to me to wonder if you can just subtract forces like...