Este Quiz é cronometrado.
Você tem 3 minutos para completar as 8 questões deste quiz..
Force is reperesented in diagrams by a straight line with an arrow to show its direcion of action.
Usually more than one force acts on an object.
If an object is at rest, the forces must balance.
The of forces acting in the straight line is found by addition or .
If two acting at a are represented in and by the sides of a drawn from the point, their is represented in size and direction by the of the parallelogram from the point.
Scalars are added by ordinarny arithmetic, while vectors are added geomtrically.
The value of friction is called starting or friction.
When friction is than its value, it is called sliding or friction.