FORCES IN ACTION
Big Ideas
* The way to change how something moves is to add force to it.
* Motion stops when forces of the same strength are applied in opposite directions, or when the force of
friction acts on an object.
* A force has both strength and direction that determine how it affects the object’s speed and/or direction of
motion.
* Gravity is a force that has strength and direction and specifically pulls objects down. Balanced forces result
when there is no change in the motion of an object. Unbalanced forces result when there is change in the motion of
an object.
* Regular patterns of motion can predict future motion.
* Magnets cause a force (a push or a pull) on some materials and not others. They can do this without touching the
material.
* Magnets can cause a force on objects without touching them. The force decreases as the distance between magnets
and the objects increases.
* Magnets can be used in the design of a device that solves a problem.
* Electrically charged objects can exert a force on other objects.
* Motion stops when forces of the same strength are applied in opposite directions, or when the force of
friction acts on an object.
* A force has both strength and direction that determine how it affects the object’s speed and/or direction of
motion.
* Gravity is a force that has strength and direction and specifically pulls objects down. Balanced forces result
when there is no change in the motion of an object. Unbalanced forces result when there is change in the motion of
an object.
* Regular patterns of motion can predict future motion.
* Magnets cause a force (a push or a pull) on some materials and not others. They can do this without touching the
material.
* Magnets can cause a force on objects without touching them. The force decreases as the distance between magnets
and the objects increases.
* Magnets can be used in the design of a device that solves a problem.
* Electrically charged objects can exert a force on other objects.