1. FORCES
SP1d. Measure and calculate the magnitude of frictional forces and Newton’s three Laws of Motion.
SP1h. Determine the conditions required to
maintain a body in a state of static equilibrium.

2. Anything that affects the motion of an object
A PUSH or a PULL
Tension is a type of internal force when strings, ropes, etc. are used to transmit forces.
Forces

3. Forces are VECTORS Force vectors are always drawn from
the point of application.
Always draw the vector pointing away from this point.
Pushes are drawn as pulls from the other side.
Forces are VECTORS

4.  Combining Force Vectors 
Concurrent Forces – two or more forces acting on the same point at the same time.
Resultant Force – a single force that has the same effect as two or more
 Combining Force Vectors 

5. A state of a body in which there is no change in its motion.
At rest or constant velocity
Must have no net (unbalanced) forces acting on a body
Equilibrium

6. Equilibrant Force – a single force that would produce equilibrium
Equilibrant Force – a single force that would produce equilibrium. The equilibrant force is equal to and in the opposite direction of the Resultant force.
Equilibrant Force

7. To find the equilibrant force… 1) Find the resultant of the 2 concurrent forces 2) The equilibrant force must have the same magnitude, but act in opposite direction.
To Find…

8. Composition of Forces 2 components to 1 resultants
Concurrent forces can be composed
Finding the resultant
2C’s  1R
Composition of Forces

9. Resolution of Forces 1 resultant to 2 components
Finding the components when the resultant is known.
Resolving the resultant vector into its component vectors
1 R  2 C’s
Resolution of Forces