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The Force and Related Concepts. Force Can you define it? Definition: The cause of acceleration, or the change in an object ’ s velocity (or the push or.

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Presentation on theme: "The Force and Related Concepts. Force Can you define it? Definition: The cause of acceleration, or the change in an object ’ s velocity (or the push or."— Presentation transcript:

1 The Force and Related Concepts

2 Force Can you define it? Definition: The cause of acceleration, or the change in an object ’ s velocity (or the push or pull on an object) How can velocity change? Many forces can act on an object at once. The combination of all these forces is called … Net Force

3 Balanced and Unbalanced Balanced Forces All forces on the object combine for a net force of zero Balanced forces do not change the object ’ s motion The object can be moving, but there is no change Unbalanced Forces Forces acting on the object combine to produce a nonzero net force All the forces combine to act like a single force on the object Motion is affected by an unbalanced force

4 Friction What is friction? Definition: A force between two objects that are in contact that opposes the motion of either object Friction happens as long as there is … contact

5 Friction Frictional force varies with surface Examples Air Resistance A form of friction between a moving object and air molecules Depends on the size and shape of the object Examples

6 Gravity What is gravity? Definition: The force of attraction between two particles Gravity does not require contact Affected by mass and distance Not a one-way street


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