Torque is very easy to think about in the real-worldif youre using a wrench to undo a bolt, is it easier to hold the wrench at the end with the bolt or the end thats farther away? The point thats farther away has a way of cutting the work you need to do the farther away you are, and how much easier is related to the torque had at each end. Torque is incredibly useful in transitioning between linear and rotational motion, and has a great deal of applications (a car, being one of the most common). The basic concept of torque is that the farther away you are from a point of rotation, the easier it will be to rotate the object about that point. Torque is another of the big parts of rotational motion, and were only getting deeper with each lesson.
Torque is a force that causes an object to turn. It is the rotational analogue of force.
Torque must be perpendicular to the displacement to cause a rotation.
The further away the force is applied from the point of rotation, the more leverage you obtain. This distance is known as the lever arm.
The direction of the torque vector is perpendicular to both the position vector and the force vector, and can be found using the right hand rule.
Positive torques cause counter-clockwise rotational acceleration, and negative torques cause clockwise rotational acceleration.
Similar to Newton’s 2nd Law (Fnet=ma), the net torque is equal to the product of an object’s moment of inertia and its angular acceleration.
Static equilibrium is a condition in which the net force and net torque acting on an object are zero, and the system is at rest. Dynamic equilibrium is a condition in which the net force and net torque are zero, but the system is moving at constant translational and rotational velocity.
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
This book includes a comprehensive review of the key AP Physics C concepts and targeted strategies for acing every section of the exam. Additionally, the book includes two full length practice tests with full answer explanations.
The book offers a complete review of your AP course, strategies to give you the edge on test day, and plenty of practice with AP-style test questions. It includes 2 full length practice exams modeled on the real test, 3 separate plans to fit your study stle, review material updated to the most recent tests, and all the terms and concepts you need to know.