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Dick
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Yes. So it's a r-cubed force instead of an r-squared force like gravity.
imy786 said:r cubed force...is that a correct name for a force??
imy786 said:(iv) provide brief explanation in each case.
(a) Is the force law in (a-=r cubed force) attractive or repulsive?
repulsive as it has positive sign
(b)Does it satisfy Newton’s third law?
yes, as the object is two particles are opposing forces on each other
(c)Is it an inverse square law of force?
yes- it is inversely porptional
(d)Does it conserve linear momentum?
yes-momentum is alwayz converved in a colliosn
(e)Does it conserve angular momentum?
as momentum is alwayz conserved, so does angular momentum
[are these correct for these quesitons}
imy786 said:so what is the r-cubed force called?
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n3rd law- "For every action, there is an equal and opposite reaction."
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(c)Is it an inverse square law of force
no its an inverse cube
(d)Does it conserve linear momentum?
yes-momentum is alwayz converved in a collioion and is same as Newtons 3rd law
(e)Does it conserve angular momentum?
no, as there is no torque not applied to the system.
(is this correct)
imy786 said:moment= force (torque * perpendicular distance)
so if there is no moment on the foice there would be no toruq
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quesitons does say
U= -k/ r^2
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can this be a mistake in the quesiton