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