Simple Harmonic Motion: Hooke's Law

Springs are neat! From slinkies to pinball, they bring us much joy, and now they will bring you even more joy, as they help you understand simple harmonic motion and Hooke's law. Who doesn't love a good oscillation now and again? Check it out.
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[@martinnambahu2891]

thank you for this video just learned that the force is always negative because its acting in the opposite direction

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Explain relationship between newton's third law of motion and reflection of light.
Or
Differentiate , in your next coming video
Plz plz plz plz
I hope you are honest professor .

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[@oorody4297]

4:11 why we put (-)for (f)

[@ceilinaomair2397]

negative sign indicates force is in opposite direction

[@drgermankills7963]

The negative sign in the equation is simply indicating that the force is opposite of the direction of the spring displacement.

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[@shanestewart1252]

Thanks Dave. Your video reminds me of Baywatch. There is a lot of harmonic motion seen when people run on the beach.

[@shanestewart1252]

All jokes aside Dave. I was a inspector for a railroad and there is something called a harmonic unbalance it say. The difference between cross level between rails in 7 consecutive joints can not exceed . If I remember correctly it is 1 and 5/8 of a inch and if it does the track must be slowed to 10 mph. . Rail length are about 32 feet so a joint are staggered every 16 feet . If not a train car will rock off a track. I assume it is similar to a tsunami in the ocean.. why would that cause a harmonic unbalance.?

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[@danielalexanderreyespineda1131]

Hi!! teacher, I will like to know if we compute the work that will do the spring on that object (which is applying force on the spring) is it going to be -1.8 J? right? I just want to learn :c

[@srivallikatkuri8028]

Why is the force negative at the end?

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[@user-hv6ef9ie1g]

3:28 What about the formula for kinetic energy of the spring?

[@hindolchakrabartty4175]

2:19 Hooke's Law

[@BirnieMac1]

Okay but what if they’re not letting us simplify it without friction anymore
Is it just setting up the equations of motion and taking the sum of forces (friction opposing motion)?

[@anuththarachanaki7969]

Sir, How doea a restoring force occur when an object osillates?

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[@Ranbir.Bhardwaj]

At 2:22 you said that force exerted by the spring is always opposite the motion
But while coming towards centre, force and motion are in same direction.
Shouldn't it be like ' force is opposite to the direction in which spring is streched or compressed' ??

[@carultch]

I'm sure that's ultimately what he meant. The spring force is a restoring force, which is proportional to and opposite the deformation from its neutral unstressed position. The spring force doesn't "know" what the velocity or acceleration is of the mass. Viscous drag would be proportional and opposite the velocity, while the apparent "inertial force" (D'Alembert Force) of the mass is proportional to and opposite the acceleration.

[@zynex9250]

4:14 Why is f negative?

[@abuabdullaahiwaaaishatah8235]

Huh Idk 😅😅

[@pawanpreetsingh8016]

sir how we take force in negitive . i got -0.23 as a answer

[@eriksambong8806]

I would like to ask why the force has a negative sign. Is it because it is stretched?

[@shivkumarverma9124]

It's acting opposite to the direction of the force we apply, suppose a mass is connected to a spring. We apply the force on the right side, the spring tries to pull us backwards to get back to its natural length. That is, to restore equilibrium. So the force is negitive.

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Why 15.3 is negative

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Avegarohan Jaiswal

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