How to Find the Velocity | Simple Pendulum

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@Riviera-Eng 2 ай бұрын

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!

@gabrielpratavieira3632 2 ай бұрын

So nice to see energy being converted!

@Riviera-Eng 2 ай бұрын

Thanks for watching! Could you do me a favor and push the like button? And please feel free to subscribe!

@abdallanasrelden9886 2 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-Eng 2 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

@skyuniversity07 2 ай бұрын

Your hand writing is so nice! 😮what application do you use to write with? And is it on the iPad?

@Riviera-Eng 2 ай бұрын

Thanks! Yes an iPad and an Apple Pencil. I think the app is called good notes

@alexsanderbushov3484 2 ай бұрын

Nice content

@Riviera-Eng 2 ай бұрын

Thanks!

@pace_18 2 ай бұрын

Small mistake. After calculating the PE, the units are joules or newton meters, not newtons

@Riviera-Eng 2 ай бұрын

Yep! You are correct - should’ve been Joules or N*m

@Onlyfun9231 2 ай бұрын

Hello brother I am from india🇮🇳🇮🇳

@Riviera-Eng 2 ай бұрын

Hello brother! Thank you for watching!

@ridvibhuiyan9350 2 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-Eng 2 ай бұрын

Yep!

@skyuniversity07 2 ай бұрын

Next time can you include the whole word problem in the video Tyty!

@Riviera-Eng 2 ай бұрын

Yes I will!

@gitikaye 2 ай бұрын

Why was PE equated to KE?

@Riviera-Eng 2 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).

@ye6584 2 ай бұрын

Got it ty!! :) great video btw