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/sci/ - Science & Math

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2210241 No.2210241 [Reply] [Original]

hey /sci/, if i have a slingshot and i use 50N of force to pull back the slings, then release it, how much force is being applied to the projectile? is it the y component (50N) or the sum of the tensions in the slings (T)? 2T will be greater than 50N because it has a horizontal component as well (i can't solve for x because i don't know the angles in this situation). pardon my crudely drawn diagram but i think it makes more sense than i do.

tl;dr what is the force that will be exerted on the ball when the slingshot is released?

>> No.2210269

bump

>> No.2210273

F=50N
F=-kx
E=0.5kx2
Need to know the x (lenght how much you have pulled).

>> No.2210282

50N at the moment you release it, slowly diminishing in line with hooke's law

>> No.2210286

>>2210273
Also, if you dont know the x, your system would be, for example, a wall where you pull it with force 50N and add projectile, but nothing will happen when you release it.

>> No.2210318

>>2210286
you saying newton was wrong?

>> No.2210524

>>2210318
No, I'm saying that the amount of force tell nothing in this case if x is a mystery.

>> No.2210531

>>2210524
it tells you another 50N force is at work making the thing in equilibrium until released

>> No.2210560

>>2210531
Ofc, system is in rest so SumF=0. But there is no way to know how much energy this system will give to projectile.