Physics-
General
Easy
Question
A particle is constrained to move along a straight rod. The rod moves with a constant angular acceleration a. Disregarding greater of the particle, the time after its motion begins, it stops sliding along the rod is equal to
- Infinitesimal
The correct answer is:
If N is the normal contact force experienced by the particle, the maximum frictional force f = mN. (Weight of the particle = 0 as g = 0) Since this frictional force imparts necessary centripetal force mr2w that is f = mrw2 , we obtain mN = mrw2
By putting N = ma = m (r a)and w = at, we obtain
m (mra) = mra2 t2 Þ t =
That means after the particle will slide.
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