"Angular acceleration $\vec{\alpha}$ is the rate of change of angular velocity."
"Keep in mind that, by convention, counterclockwise is the positive direction and clockwise is the negative direction."
"The kinematics of rotational motion describes the relationships between the angle of rotation, angular velocity, angular acceleration, and time."
"The angular version of force is torque $\vec{\tau}$, which is the turning effectiveness of a force."
"Torque is maximized by applying force perpendicular to the lever arm and at a point as far as possible from the pivot point or fulcrum. If torque is zero, angular acceleration is zero."
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"Angular acceleration $\vec{\alpha}$ is the rate of change of angular velocity."
"Keep in mind that, by convention, counterclockwise is the positive direction and clockwise is the negative direction."
"The kinematics of rotational motion describes the relationships between the angle of rotation, angular velocity, angular acceleration, and time."
"The angular version of force is torque $\vec{\tau}$, which is the turning effectiveness of a force."
"Torque is maximized by applying force perpendicular to the lever arm and at a point as far as possible from the pivot point or fulcrum. If torque is zero, angular acceleration is zero."
What you'll learn
- Define angular acceleration α = Δω/Δt and apply the counterclockwise-positive sign convention
- Relate tangential acceleration and angular acceleration using a = rα, and distinguish tangential from centripetal acceleration
- State the rotational kinematics equations as analogs of the linear equations and use them to solve constant-α problems
- Define torque and lever arm, and use τ = rF sinθ to compute torque
- Explain how to maximize torque and why zero net torque means zero angular acceleration
Slides
Interactive presentations perfect for visual learners • In development
Slides
In development
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