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20 lip 2022 · While the hanger is falling, the rotor-washer combination has a net torque due to the tension in the string and the frictional torque, and using the rotational equation of motion, \[\operatorname{Tr}-\tau_{f}=I_{R} \alpha_{1} \nonumber \]
- Torque
Alternative Approach to Assigning a Sign Convention for...
- MIT OpenCourseWare
Chętnie wyświetlilibyśmy opis, ale witryna, którą oglądasz,...
- Cc By-nc-sa
Chętnie wyświetlilibyśmy opis, ale witryna, którą oglądasz,...
- 10.7: Torque
Describe how the magnitude of a torque depends on the...
- Torque
In the following formulas, P is power, τ is torque, and ν (Greek letter nu) is rotational speed. P = τ ⋅ 2 π ⋅ ν {\displaystyle P=\tau \cdot 2\pi \cdot \nu } Showing units:
Describe how the magnitude of a torque depends on the magnitude of the lever arm and the angle the force vector makes with the lever arm. Determine the sign (positive or negative) of a torque using the right-hand rule. Calculate individual torques about a common axis and sum them to find the net torque.
Torque is a vector since angular acceleration is a vector, and rotational inertia is a scalar. Let us examine which variables torque depends on by thinking about its units: The last equality in the above equation comes from definition of Newtons: F = ma = [kg ⋅ m/s2] ≡ [N] F = m a = [k g ⋅ m / s 2] ≡ [N].
Equation 10.25 is Newton’s second law for rotation and tells us how to relate torque, moment of inertia, and rotational kinematics. This is called the equation for rotational dynamics. With this equation, we can solve a whole class of problems involving force and rotation.
Course: Physics archive > Unit 7. Lesson 2: Torque, moments, and angular momentum. Torque. Finding torque for angled forces. Rotational version of Newton's second law. More on moment of inertia. Rotational inertia. Rotational kinetic energy. Rolling without slipping problems.
We've looked at the rotational equivalents of displacement, velocity, and acceleration; now we'll extend the parallel between straight-line motion and rotational motion by investigating the rotational equivalent of force, which is torque.
