1. FORCE – PUSH OR PULL
The unit of measurement for force is the Newton (N)

2. FORCES ACT IN PAIRS
BALANCED FORCES – OCCURS WHEN
THE FORCES ACTING ON AN OBJECT
ARE EQUAL TO EACH OTHER AND
THERE IS NO MOVEMENT.

3. UNBALANCED FORCES – OCCURS WHEN THE FORCES ACTING ON AN OBJECT ARE NOT EQUAL TO EACH OTHER AND THERE IS MOVEMENT.

4. FRICTION – A FORCE THAT PUSHES
AGAINST MOVING OBJECTS.

5. AIR RESISTANCE – A FORM OF FRICTION THAT EXISTS BETWEEN OBJECTS MOVING THROUGH THE ATMOSPHERE.

6. GRAVITY – A PULLING FORCE OF
ATTRACTION THAT EXIST BETWEEN
ANY TWO OBJECTS WITH MASS.

7. GRAVITY PULLS ALL OBJECTS DOWN AT THE SAME RATE.
WITHOUT AIR RESISTANCE WITH AIR RESISTANCE
(VACUUM)

8. WORK – THE ACTION THAT RESULTS WHEN A FORCE CAUSES AN OBJECT
TO MOVE IN THE DIRECTION OF THE
FORCE.
Work = Force x Distance (W=FxD)
Joule (J) is the unit of measurement for work

9. HOW MUCH WORK HAS BEEN DONE IN EACH SITUATION BELOW?
W=FxD
Ms. Johnson used a force of 10 Newtons to push a box 5 meters across the floor. How much work did she do?
______Joules
Mrs. Wit Mal used a force of 100 Newtons to pull a desk 2 meters across the floor. How much work did she do?
Mr. Moore used a force of 1,000 Newtons to pull a car 0 meters down
the street. How much work did he do?

10. HOW MUCH WORK HAS BEEN DONE IN EACH SITUATION BELOW?
W=FxD
Ms. Johnson used a force of 10 Newtons to push a box 5 meters across the floor. How much work did she do?
50 Joules
Mrs. Wit Mal used a force of 100 Newtons to pull a desk 2 meters across the floor. How much work did she do?
200 Joules
Mr. Moore used a force of 1,000 Newtons to pull a car 0 meters down the street. How much work did he do?
0 Joules

11. ENERGY – THE ABILITY TO DO WORK.