The Torque Concept
Torque is a measure of the effectiveness of a force acting on an object to rotate that object about a certain axis. If torque is 0, it means the force does not cause an object to rotate.
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00:01Here is the thin stick.
00:05One end of the thin stick was attached to the shaft.
00:12An external force is applied to one end of the other perpendicularly.
00:18This external force is in the form of a push by the palm of the hand.
00:23The thin stick does not move translationally,
00:26but the stick rotates around the axis with a certain acceleration.
00:37Now, the external force hits the stick from bottom right to top left.
00:42The magnitude of the external force is still the same.
00:45The only difference is the direction.
00:49If previously the external force formed an angle of 90 degrees,
00:53now the external force forms an angle of 45 degrees,
00:56or 135 degrees, depending on how we measure the angle.
01:04The stick also rotates around the axis,
01:06but with a lower acceleration compared to the previous acceleration.
01:19Next, an external force hits the stick towards the left.
01:24This time the external force forms an angle of 0 degrees,
01:27or 180 degrees, depending on how we measure it.
01:34It turns out the stick doesn't move at all.
01:37The stick doesn't rotate, the stick doesn't move translationally either.
01:49Based on these three conditions, the same external force
01:52applied to the same object can produce different effects.
01:57Objects rotate with varying angular acceleration.
02:01From here the term torque is known.
02:08Torque is a measure of the effectiveness of a force acting on an object
02:11to rotate that object about a certain axis.
02:15If torque is zero, it means the force does not cause an object to rotate.
02:24Thank you for watching this video.
02:26Don't forget to watch the next video.