Discuss how motion is relative to a fixed point. Objects at rest have motion, relative to the Earth. Speed is relative to the Earth's surface. Elicit formula to determine speed. Define and use examples to differentiate between instantaneous and average speed. Elicit formula for average speed. Discuss velocity and constant velocity.

Elicit a definition for the law of inertia, incorporating rest and motion, uniform speed and straight line motion. Demonstrate differences in inertia due to weight and mass differences. Relate mass to inertia and define weight. Discuss why an object with greater mass possesses a greater inertia and requires a greater force to change it.

Complete the data charts from Thursday's lab. Review the results. Plot a graph of the distance V time. Discuss questions and observations listed on the lab report.

Work two lab investigations which demonstrate Newton's law of inertia and the relationship between distance and time during linear movement down an incline plane. The eventual result will be to determine a formula for free fall. lab investigations 7 and 11.

Discuss how motion is relative to a stationary object as well as one moving and at rest. Discuss how speed is relative to the Earth's surface movement. Elicit a formula to determine speed. Discuss instantaneous speed and average speed. Define velocity, compare it to speed, and demonstrate the definition of velocity.

Demonstrate the affect of inertia on an object in motion. Discuss the relationship of mass and inertia. Indicate how a greater force is required to change the state of motion. Discuss mass and volume definitions. Define weight as a force, mass x pull of gravity, measured in Newtons. Discuss why an object tossed into the air while on a moving train does not crash into the rear door.

Discuss forces which are acting on a model car placed on the table. Discuss friction effect. Discover why friction is a force which acts opposite the push or pull force. Discuss friction in terms of irregular surface. Discuss the effect of friction on the motion of the object. Elicit the affect on the car if no friction was present on the surface. Discuss what is necessary in order to prevent the car from stopping. Illustrate infinite movement from a single force if friction was zero. Discuss inertia as a force needed to overcome friction to begin movement.

Discuss support force and gravity on an object. Discuss states of motion for objects at equilibrium and the net force equal to zero. Define equilibrium. Discuss the effect of friction. Introduce the 2 stages of equilibrium.

Review how force vectors require both magnitude and direction. Differentiate scalar quantities from vector4 quantities. Discuss net force. Examine and define support forces as an upward force which balance the weight. Define weight as the gravitational force determined by 9.8l kg m/sec squared.
Explain support force

Define specific terms: equilibrium, force, net force, tension, vector
Use examples to demonstrate how the combination of all forces acting on an object will result in a vectored net force. Demonstrate using a kg mass with 2 spring balances to arrive at a zero net force. Demonstrate how the stretching of a spring in a spring balance translates into a "stretching force" which is tension. Draw and explain the use of force vectors to demonstrate a vector quantity with magnitude and direction. Differentiate between a vector quantity and a scalar quantity.