The body in the figure is pivoted at O. Three forces act on it: FA = 10N at point A, 8.0m from O; FB = 16N at point B, 4.0m from O; and FC = 19N at point C, 3.0m from O. What is the net torque about O? I am using the formulas: tauA = FArA sin thetaA = (10)(8.0) sin 1350; tauB = FBrB sin thetaB = (16)(4.0) sin 900;
Angular speed, acceleration and displacement
Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.
Angular Position
Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.
The body in the figure is pivoted at O. Three forces act on it: FA = 10N at point A, 8.0m from O; FB = 16N at point B, 4.0m from O; and FC = 19N at point C, 3.0m from O. What is the net torque about O?
I am using the formulas: tauA = FArA sin thetaA = (10)(8.0) sin 1350; tauB = FBrB sin thetaB = (16)(4.0) sin 900;
tauC = FCrC sin thetaC = (19)(3.0) sin 1600
So, I can find the magnitudes of the three torques (tauA, tauB, and tauC). I do not know how to determine their signs, that is, how to determine the direction of the rotation (clockwise or counterclockwise). Please explain what is the axis of rotation here, and how to determine the direction of the rotation (clockwise or counterclockwise) for this problem specifically and in general.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
