An object is rotating about a fixed axis in space. Since there is no translation
ID: 2120310 • Letter: A
Question
An object is rotating about a fixed axis in space. Since there is no translational motion, no work is done.
a)true
b)false
The moment of inertia of a hoop of radius r and mass m is the same as a point particle of the same mass rotating about a radius r.
a)true
b)false
In the equation a = %u03B1r, %u03B1 must be in units of rad/time2.
a)true
b)false
A disk of radius 0.25 m is rotating with a constant angular acceleration of 12 rad/s2. At the instant the angular velocity is 4.0 rad/s2, the resultant acceleration vector has a magnitude of ____.
a)5.0
b)13
c)4.1
d16
Without the aid of friction, how fast can a car travel around a 45.0 m radius circle banked at 20.0o?
a)56.1
b)12.7
c)23.0
d)160
Explanation / Answer
1)
b)false
2)a)true
3) a)true
4)d)16
5)b)12.7