1. Unit 4 Forces and motion

2. Force video
motion/force-and-motion.htm
How did the soccer ball move?
What is a force?
What kind of force was done on the soccer ball?
The force of the kick sent the ball in motion.

3. Video continued
Inertia: tendency for an object to resist change in motion.
Ball was sitting still before being kicked.
Friction: A force acting against a moving object.
Texture of grace.
More friction means more force needed.

4. Fill in the blank A force is a push or pull that acts on an object.
Every force has a strength, or magnitude. This strength is measured in units called newtons (N).
Forces can change the way objects move.
Write an example on how forces are exerted on an object. (examples on page 62)

5. Contact Forces
A force that requires two pieces of matter to touch is called a Contact Force.
One kind of contact force is Friction. Friction is the force that results when two materials rub against each other.
Solids are not the only materials that can cause friction. Air and water also resist motion when an object pushes against them.

6. Continue with graphic organizer

7. Non-contact forces
A force that acts at a distance is called a non-contact force.
Three examples of non-contact forces are:
___Gravity
___Electric force
___Magnetic Force

8. Balanced and unbalanced forces
Equal forces that combine to act on an object in opposite directions are Balanced Forces.
When the net forces are equal the forces are zero .
Unbalanced Forces
Unbalanced forces occurs when one of the forces action upon an object is greater than another force.

9. Balanced force

10. Unbalanced forces

11. Balanced and unbalanced forces

12. Brainpop game

13. Tug a war

14. Fill out the first page with what you think will happen.
Boys vs. Girls
Even number of students on one side vs. even number of students on the other side.

15. Acceleration

16. Acceleration
motion/acceleration.htm
Rate at which the speed or direction of motion changes over time.
Acceleration is not just when an object is speeding up.
In science it means any change in motion.
If the object moves in a straight line with no change in speed, there is no acceleration.
What can you think of that has acceleration?

17. Motion without acceleration is uniform motion.
An example would be a train on a straight track at a steady speed.

18. Resources:
Persons interactive book.
Brain pop
Standards
5.P.5: The student will demonstrate an understanding of the factors that affect the motion of an object
5.P.5A.2 Develop and use models to explain how the amount or type of force (contact and non-contact) affects the motion of an object.
5.P.5A.3 Plan and conduct controlled scientific investigations to test the effects of balanced and unbalanced forces on the rate and direction of motion of objects.