Recent content by Physical_Fire

Alright. I’ll try doing that but as before I get my answer in terms of V. How do I get in terms of U? And I think you misread the problem. In the example problem, U is the initial velocity (so mgcos(θ) makes sense) and not the midpoint like in the problem I have to solve.

At the very top; the centre of the circle (D).

What do you mean? The question is attached above. They are symmetrical as far as I can see.

Here’s what I did and got:

Hi, I have a homework question involving conservation of energy and centripetal force. My instructor provided an example with a solution, which I tried to apply to my homework problem, but without success. I tried using V as the initial speed, but in the end I ended up with a range for V. Could...

I think I understand it now. Thanks everyone

positive?

Is it positive?

It's negative

then how to sketch this graph?

Yeah I understand that @PeroK. But how do I solve it mathematically dy/dt (x,t) = -v * f'(x-vt)? Since it's a sin graph, dy/dt (x,t) = -v * cos(x-4pi). But it doesn't give me the correct graph. Why and how do I get the correct graph mathematically?

Like this? But it doesn't make sense. Why is the particle going down?

dy/dt (x,t) = -v * f'(x-vt)?

Hasn't it gone up because the curve is upwards?

Isn't the particle going up and then down?