BALANCED AND UNBALANCED FORCES
WARM UP What is speed?
Imagine that two birds leave the same tree at the same time. They both fly at 10km/hr for five minutes, 12km/hr for eight minutes, and 5km/hr for ten minutes. Why don’t they end up at the same place?
WARM UP CONTINUED Velocity- the speed of an object in a
particular direction
Which of the following statements gives an accurate example of velocity?
a. An airplane’s velocity is 600km/hrb. An airplane’s velocity is 600km/hr south
MINI LESSON-CHECKING LAW 1 The first law says that an object at rest
tends to stay at rest, and an object in motion tends to stay in motion, with the same direction and speed unless a force acts on it.
Question: What do you think will happen to a toy car put in motion on earth?
MINI LESSON-CHECKING LAW #1 Hypothesis
observationexperiment
results trial 1
trial 2 trial 3
conclusion
WHAT IS THE PURPOSE OF HAVING MULTIPLE TRIAL RUNS?
FORCES Definition- a push or pull
Made up of- size and direction
Unit- Newton
WAYS THAT WE USE FORCES EVERYDAY Texting Opening a car door Opening window blinds or shades Combing your hair
NET FORCE- THE COMBINATION OF ALL FORCES ACTING ON AN OBJECT
When forces act in the same direction, you add the forces to determine the net force. The net force will be in the same direction as the individual forces
UNBALANCED FORCE- NET FORCE IS GREATER THAN ZERO AND PRODUCES A CHANGE IN MOTION
When two forces act in opposite directions, you subtract the smaller force from the larger force to determine the net force. The net force will be in the same direction as the larger force.
BALANCED FORCE WHEN THE FORCES ON AN OBJECT PRODUCE A NET FORCE OF ZERO
BALANCED FORCE WHEN THE FORCES ON AN OBJECT PRODUCE A NET FORCE OF ZERO
CLASS WORK
CLASS WORK EXIT SLIP
Draw an illustration of playground equipment and tell how it is either a balanced or unbalanced force
What is the difference between speed and velocity
What is the difference between balanced and unbalanced forces
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