Mersa wrote on Sep 2
nd, 2018 at 9:47am:
If it pushes you on release why does it move you when spinning it? if you had no sling you wouldn't move until release ??
Think of the projectile and the person as disconnected bodies that apply forces to each other, when you swing round the sling there is an inwards force on the projectile towards the rtn centre (as with all circular motion), but there is also an equal and opposite force from the projectile onto your hand/arm (this is like the tension you feel in the cord). That tension applies an equal force to your hand and thus body (since your arm is effectively rigid in powering the sling). The force is still there on earth but is basically absorbed into the ground through friction at your feet.
If you had no sling then you wouldn't apply force to the projectile nor the projectile to you. I presume you mean if you threw it by hand?
Well it's the same principle, you would actually move throughout the acceleration of the projectile before launch. This is because your hand/arm with the projectile weight at the end are pushed forward, your body is pushed back, if you didn't let go of the projectile then the motion would simply be stopped as the projectile/hand/arm were pulled in.
You can get a feel for this if you sit on a rotating office chair, if you swing something heavy in your arm it pushes your body backwards slightly, but then as you stop that object from moving it applies the reverse force and you come to rest, it's only if you let go of the object that you keep moving.
Morphy wrote on Sep 2
nd, 2018 at 9:53am:
I suggest it's secret option number 5.
Which is space isn't real, the Earth is flat, gravity doesn't exist (yes that's an actual belief I #!$@ you not) and our Reptoid overlords simply would not allow slings in the space matrix.
Upon discovering this glitch your body would be immediately liquified and fed to the rest of us who are, even now, being held captive and unresponsive. Used as a power source by the Mandroids from Zeti Reticuli even though the body puts out about as much power as a light bulb so that plot point is sort of ridiculous.
So ridiculous you might say....that it MUST be true.
Good points, I want to change my answer