Recent content by lemonxx

Hi. So, i am currently studying reciprocal lattices, and am not quite sure how to find the edge length of a reciprocal lattice. for example I had expected the RL of BCC, which is FCC, to have edge lengths 2pi/a but it turns out it is 4pi/a, how come?

i’m still confused. my hand exerts an applied force on the ground and the ground exerts a force back, but my hand also exerts friction on the ground and the ground exerts friction back on my hand?

this might be a silly question, but if I slide my hand on the floor thereby exerting force on the floor, then by newtons 3rd law, the floor should exert an equal and opposite force back on my hand, which is kinetic friction, but if there is a fixed coefficient of kinetic friction (kinetic...

if a box is sitting on a flat surface and I apply 10 N on it, then the box would apply 10 N on my hands, but the static friction (assuming maximum static friction is greater than 10 N), would oppose the applied force with 10 N thereby keeping the box at rest. what I do not understand is this: is...

i finally got it. thank you so much!

it should be backwards to decelerate the car, but i don’t get why or how considering the wheels are still rotating

what does that mean exactly? my main issue is that i don’t understand why static friction changes direction when braking as opposed to driving normally

When tires lock, the tires exert a forward force on the ground and the ground exerts a reaction force (kinetic friction) on the tires in the opposite direction. But if the car brakes slowly, the tires are still rotating and so they exert a backward force on the ground, and the ground exerts a...