Joules, not newtons!! When I solved for the energies, the units should be joules, not newtons! My mistake. 1 joule = 1 N*m Thank you to the commenter down below for catching that!
@gabrielpratavieira36322 ай бұрын
So nice to see energy being converted!
@Riviera-Eng2 ай бұрын
Thanks for watching! Could you do me a favor and push the like button? And please feel free to subscribe!
@abdallanasrelden98862 ай бұрын
great video. what happens to the formulas if we included the friction and air resistance?? + can you do an example on this situation??
@Riviera-Eng2 ай бұрын
Thanks! First I’d solve it in terms of angular velocity. Then a ‘drag’ force is added in, which is proportional to the angular velocity (this is true for something moving slowly like a pendulum. Objects at higher speed the drag force is proportional to velocity squared). So once a sum of forces is done, it’d be a 2nd order linear differential equation (with a couple assumptions - one being small angle theorem so we don’t have any sin or cos in our differential equation). Then the solution to the differential equation would be an angular velocity that is a decaying exponential (e raised to a negative value). Hard to explain in words, but in short it’s more complicated so I’ll do a video on it, hopefully soon
@skyuniversity072 ай бұрын
Your hand writing is so nice! 😮what application do you use to write with? And is it on the iPad?
@Riviera-Eng2 ай бұрын
Thanks! Yes an iPad and an Apple Pencil. I think the app is called good notes
@alexsanderbushov34842 ай бұрын
Nice content
@Riviera-Eng2 ай бұрын
Thanks!
@pace_182 ай бұрын
Small mistake. After calculating the PE, the units are joules or newton meters, not newtons
@Riviera-Eng2 ай бұрын
Yep! You are correct - should’ve been Joules or N*m
@Onlyfun92312 ай бұрын
Hello brother I am from india🇮🇳🇮🇳
@Riviera-Eng2 ай бұрын
Hello brother! Thank you for watching!
@ridvibhuiyan93502 ай бұрын
You can get the same results using v² = u² + 2gh, here u = 0. So, you get the answer of v ≈ 4.4 m/s
@Riviera-Eng2 ай бұрын
Yep!
@skyuniversity072 ай бұрын
Next time can you include the whole word problem in the video Tyty!
@Riviera-Eng2 ай бұрын
Yes I will!
@gitikaye2 ай бұрын
Why was PE equated to KE?
@Riviera-Eng2 ай бұрын
At any point, the pendulum’s total energy will equal its PE + KE. And the total energy will be the same throughout the movement (not accounting for air friction losses). At the top of the swing, the pendulum only has PE because it is not moving. And at the bottom of the swing, the pendulum only has KE because it can’t go any lower. And since the total energy at every point is equal, we can set the total energy at the top equal to the total energy at the bottom. And since total energy at top is only PE and since total energy at bottom is only KE, we can say PE at top equals the KE at the bottom. (Again, not accounting for air friction losses in this problem).
@ye65842 ай бұрын
Got it ty!! :) great video btw
@microwswish52182 ай бұрын
Helpful, but you should have used "joules" instead of "newtons".