Rotational Motion
Practice Test
1.
In Figure 8-3, why does applying a force as in the picture at the bottom left result in no effect?
a.
The force is applied at the axis of rotation.
b.
The force is applied perpendicular to the lever arm.
c.
The force is applied parallel to the lever arm.
d.
The force is applied perpendicular to the axis of rotation.
Hint
2.
The __________ of an object is the point on the object that moves in the same way that a point particle would move.
a.
axis
b.
torque
c.
center of mass
d.
orbit
Hint
3.
In Figure 8-2, if the radius of the CD is 6.0 cm and the angular velocity is 5.0 rad/s, what is its angular displacement in 2.0 s?
a.
1.7 rad
b.
1.0×10
1
rad
c.
0.60 rad
d.
6.0×10
1
rad
Hint
4.
The product of the force and the lever arm is called __________.
a.
torque
b.
equilibrium
c.
power
d.
range
Hint
5.
In Figure 8-2, if the radius of the CD is 6.0 cm and the angular velocity is 5.0 rad/s, what is the linear displacement of a point on the edge in 2.0 s?
a.
0.30 m
b.
3.8 m
c.
60 m
d.
0.60 m
Hint
6.
What causes the Coriolis force?
a.
winds
b.
gravity
c.
low pressure areas
d.
the rotation of Earth
Hint
