WorksheetsLecture Phy210 - Rotational Motion (Practice)
Total questions: 20
Worksheet time: 31mins
The formula used to find a torque is...
(m)(g)
(F) cos(Ɵ)
(F)(r)( sin θ )
(m)(a)
Convert 2 revolution to radian.
Convert 45 degree to revolution.
What is the period if the angular velocity 2 rad/s?
What is angular acceleration if the angular speed is 5 rad/s and time is 2 s?
The number of complete revolutions per second is:
frequency
period
torque
rotational inertia
The time required for one complete revolution is:
torque
frequency
period
rotational kinetic energy
The drum of a washing machine rotates 1800 times in 3 minutes. What is the period?
0.1 s
0.2 s
0.3 s
0.5 s
The relation between linear velocity and angular velocity
r = v⍵
⍵ = vr
v = r⍵
a = v⍵
1 revolution:
57°
90°
180°
360°
Calculate the net torque (magnitude and direction) on the beam in the figure shown about an axis through O perpendicular to the page.
30 N·m, CCW
30 N·m, CW
36 N·m, CW
36 N·m, CCW
Calculate the net torque (magnitude and direction) on the beam in the figure shown about an axis through C perpendicular to the page.
30 N·m, CCW
30 N·m, CW
36 N·m, CW
36 N·m, CCW
Unit of torque is
Nm
J
N/m
Watt
Who has the larger linear (tangential) velocity?
Klyde
Bonnie
Same
both zero
Klyde's angular velocity is
the same as Bonnie's
twice Bonnie's
half of Bonnie's
1/4 Bonnie's
What force does not cause any torque?
Force perpendicular to the fulcrum.
Force horizontal to the planck.
Force slightly off center of the fulcrum
Forces at a 45 degree angle to the fulcrum, and not on the fulcrum
