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Flipping Physics
Torque - Mass on Plank with String
A 0.300 kg mass rests on a 0.395 m long, 0.764 kg, uniform wooden plank supported by a string as shown in the figure. If the mass is 0.274 m from the wall and the angle between the string and the plank is 32.1°, (a) What is the force of...
Flipping Physics
Net Torque on a Door Problem
Three people push on a door. We determine the net torque.
Flipping Physics
2 Masses on a Pulley - Torque Demonstration
0.100 kg and 0.200 kg masses hang from either side of a frictionless #Pulley with a rotational inertia of 0.0137 kg·m^2 and radius of 0.0385 m. (a) What is the #AngularAcceleration of the pulley? (b) What is the #TensionForce in each...
Flipping Physics
Torque Introduction
Translational and Rotational motion are demonstrated and reviewed. Torque is introduced via the equation and several door opening demonstrations. Moment arm or lever arm is defined and illustrated.
Flipping Physics
Demonstrating Rotational Inertia (or Moment of Inertia)
Thank you to Arbor Scientific for letting me borrow their Rotational Inertia Demonstrator to … uh … demonstrate rotational inertia.
Flipping Physics
Rotational Form of Newton's Second Law - Introduction
A very basic introduction to the rotational form of Newton’s Second Law of Motion by way of its translational form.
Khan Academy
Khan Academy: Electric Motors (Part 1)
Sal Khan shows that there will be a net torque on a loop of current in a wire in this video. He also shows that this net torque will cause the loop to rotate. [10:35]