High School
SAT
ACT
University
MCAT
LSAT
DAT

A merry-go-round starts from rest and is accelerating to 100 revolutions per se…

Related Topics

Wize University Physics Textbook (Master) > Angular / Rotational Motion

Rotation Kinematics

3 Activities

A merry-go-round starts from rest and is accelerating to 100 revolutions per second in 25 seconds. Calculate the angular acceleration α\alpha and the number of revolutions the merry-go-round completes in 1 minute.


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.
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 m2 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 m2 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?
rotational motion
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?