High School
SAT
SAT Elite 1500
SAT Tutoring
ACT
ACT Elite 33
ACT Tutoring
University
MCAT
MCAT Elite 515
Med-School Admissions
Pre-Med Tutoring
Pre-Med Plus
LSAT
LSAT Elite 170
LSAT Self-Paced
LSAT Tutoring
DAT
DAT Elite
DAT Tutoring
Log in
Get Started for Free
rotational motion
Related Topics
Wize University Physics Textbook (Master) > Angular / Rotational Motion
Rotation Kinematics
3 Activities
A disc rotates through 10 radians in 4 seconds. The disc experienced uniform acceleration. If the disc starts from rest, what is the angular velocity after four seconds?
25rad/s
5rad/s
40rad/s
3rad/s
42rad/s
I don't know
Check Submission
More Rotation Kinematics Questions:
The revolutions of your truck engine climb steadily from 1200 rpm to 5500 rpm in 2.7s. What is
a) the engine's angular acceleration? (in $rad/s^2$)
b) the tangential acceleration of a point on the edge of the engine's 3.5cm diameter crankshaft? (in $m/s^2$)
Practice: Quick rotational dynamics
The engine of a turbine has a torque of 100 Nm. The engine rotates a 20 m long and 100 kg blade. How long does it take the blade to reach to 400 rpm? Model the blade as a thin rod.
A merry-go-round starts from rest and is accelerating to 100 revolutions per second in 25 seconds. Calculate the angular acceleration
α
\alpha
α
and the number of revolutions the merry-go-round completes in 1 minute.
The revolutions of your truck engine climb steadily from 1200 rpm to 5500 rpm in 2.7s. What is a) the engine's angular acceleration? b) the tangential acceleration of a point on the edge of the engine's 3.5cm diameter crankshaft? c) the number of revolutions the engine makes during this time?
A disk with moment of inertia of 10 kg m
2
and a radius of 1 m rotates on a frictionless axis perpendicular to the disk and through its center. A force of 10 N is applied tangentially to the rim. If the disk starts at rest, what is its angular velocity after 2 turns?
If a wheel of radius 0.1m is rotating at 100rpm, find the velocity at the outer rim of the wheel.
A stone of mass 9.5kg is hung vertically from the end of a rope that is wound around a pulley on a boat. The moment of inertia of the pulley is 0.47kg m
2
and the radius is 0.25m. The stone is released from rest and falls toward the water, causing the pulley to rotate. After the stone has fallen 2.5 m, what is the angular velocity of the pulley?