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  3. question 1: two point masses are the same distance

QUESTION 1: Two point masses are the same distance R from an axis of rotation and have...

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Question

Physics

QUESTION 1:

Two point masses are the same distance R from an axisof rotation and have moments of inertia IA andIB.

(a)

If IB = 4IA, what is theratio

mB
mA

of the two masses?

mB
mA

=

(b)

In terms of R, at what distance from the axis ofrotation should mass A be placed so that

IA =IB?

R

QUESTION 2:

A large grinding wheel in the shape of a solid cylinder ofradius 0.330 m is free to rotate on a frictionless, vertical axle.A constant tangential force of 230 N applied to its edge causes thewheel to have an angular acceleration of 0.980rad/s2.

(a) What is the moment of inertia of the wheel?
kg · m2

(b) What is the mass of the wheel?
kg

(c) If the wheel starts from rest, what is its angular velocityafter 4.60 s have elapsed, assuming the force is acting during thattime?
rad/s

Answer & Explanation Solved by verified expert
3.9 Ratings (505 Votes)
ANSWER 1The moment of inertia of a point mass is given byPART AMoment of    See Answer
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