Principle of Work and Energy Example 1 - Engineering Dynamics

Example problem on using the principle of work and energy to calculate the velocity of a particle. The video demonstrates how to calculate the work associated with a spring and gravity.

[kristina-wcih]

I think I'm in love. So glad I just found this channel

[Raddz]

so the spring and wieght work are not projected onto the axis of motion, et ?

[hassanhaseeb]

Bro I fucking love you. Got a 98 on my dynamics exam cuz of you

[hamedhilal]

but the direction of the spring force isn't exactly against the direction of motion.. do you have time to explain this to me?

[ameyabhiwapurkar]

How do you write there any link by which I can understand this?

[MisterBinx]

Okay I see the magic of this problem. We don't care about the total displacement to the right or downward done by the spring. Those components don't matter. We are only using the change in spring length to calculate the work done. I thought since we used delta y for the weight we needed to used delta s or delta y when calculating the work done by the spring. Only having to calculate change in spring length makes this problem super easy.

[mukadder]

what happened to change in potential energy??

[slightlyHy]

no one:
me watching ur vids:
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[lalitajoshi]

Can you please teach us how to determine static and kinematic indeterminacy of Frames? I'm really having hard time understanding this moreover I strongly rely on your videos for my exams so it would be of great help if you could make some time and do a video on that topic. Thank you! :)

[unnoticedspacegoat]

You should’ve take the component of the spring in the direction of the position vector of the particle. Some amount of spring force acting on surface with perpendicular angle mean that this component does not have work on particle.

[kpmanee]

Wouldn't work done by spring force always be negative? because even as you compress, the force of spring will be in the opposite direction to the direction of motion. Oh wait, compression starts when you pass equilibrium (0) point... I see

[Moh-iisf]

When I can used the principle and work energy ...،

[alialmaani]

To late bro
I already had my exam on this subject