Unit 4- Turning Effects Of Forces Flashcards
The turning effect of a force is called its _____________.
Moment
What is the definition of the moment of a force?
The moment of a force about a pivot is the product of the force and the perpendicular distance from teh pivot to the line of action of the force.
What is the formula of moment?
Moment = F x d
The line of action is drawn using a __________ and can be ___________. The dotted line is the ______________________.
The line of action is drawn using a dashed line and can be extended to any length. The dotted line is the perpendicular distance (which is also the shortest distance) between the line of action and the point O about which the moment is calculated.
What is the SI unit of moment?
Nm
Even though Nm is the same as ___________, _________ is a ______________________.
Even though Nm is the same as the joule when expressed into S.I. Base units, moment is a different physical quantity from work or energy. Furthermore, moment is a vector quantity while work and energy are scalars.
What should you take note for your answer when expressing moment?
Make sure to have the magnitude, the units (Nm) and the direction (clockwise moment/direction or anti clockwise moment/ direction)
What is the principle of moment?
The principle of moment states that for a body in equilibrium, the algebraic sum of the moments of all the external forces acting on the body about any axis is equal to zero.
