3 ms·
Doesn't this just prove that Newton's First Law is not, in fact, equivalent to the claim that "in the absence of a net external force, a body is unaccelerated"?
by jasonhansel 3y ago
Doesn't this just prove that Newton's First Law is not, in fact, equivalent to the claim that "in the absence of a net external force, a body is unaccelerated"?
(There's also the question of whether r(t) in (3) is differentiable at t=T, right?)
- mathieutd 3y agoThere is an external force here: gravity.
- sudosysgen 3y agoYes, hence the two not being the same - there is no net force.