# Need help with these 2 questions please, Any help at all is appreciatedWatch

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#1

https://ibb.co/album/hHiEDv
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4 months ago
#2
I can't provide a full answer or anything rn (bad place to do it) but I can give some hints...

For the tension rope thing one:

You can work out the extension of the ropes using pythagoras
Once you have found the extension, you can find the spring constant using the force they have given you: T = K(EXTENSION) and solve for K.
You can work out the potential energy for each rope using the potential formula you know. Careful with how you do it, there are two ropes.

There's probably a part about the speed when released and a bunch of stuff like that, but once you have the initial potential energy, you can use the mass to calculate gravipotential and go forward from there.

For the other Q, consider torque/moments/etc:

The total torque on the body should be equal to zero for there to be no introduced rotation. Moments is just a simpler way to think about this (iirc)... a key principle in this is that the moment from a force acting through a point about that same point is going to equal zero, since it introduces no rotation about that point.

So just pick two pivots such that you can omit a force or another, form a simultaneous equation, and solve for what you want.
0
#3
(Original post by Callicious)
I can't provide a full answer or anything rn (bad place to do it) but I can give some hints...

For the tension rope thing one:

You can work out the extension of the ropes using pythagoras
Once you have found the extension, you can find the spring constant using the force they have given you: T = K(EXTENSION) and solve for K.
You can work out the potential energy for each rope using the potential formula you know. Careful with how you do it, there are two ropes.

There's probably a part about the speed when released and a bunch of stuff like that, but once you have the initial potential energy, you can use the mass to calculate gravipotential and go forward from there.

For the other Q, consider torque/moments/etc:

The total torque on the body should be equal to zero for there to be no introduced rotation. Moments is just a simpler way to think about this (iirc)... a key principle in this is that the moment from a force acting through a point about that same point is going to equal zero, since it introduces no rotation about that point.

So just pick two pivots such that you can omit a force or another, form a simultaneous equation, and solve for what you want.
Thanks very much man
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