# Unit Two: PHYSICS - PowerPoint PPT Presentation

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Unit Two: PHYSICS. Physics (Forces and Motion) Vocabulary. Force : any push or pull on an object. 2 Types of Forces!. Unbalanced Forces. Balanced Forces. Unbalanced Force. =. Forces acting on an object are NOT EQUAL !. =. =. There IS a change in MOVEMENT!.

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Unit Two: PHYSICS

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### Physics (Forces and Motion)Vocabulary

• Force: any push or pull on an object.

### 2 Types of Forces!

• Unbalanced Forces

• Balanced Forces

### Unbalanced Force

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• Forces acting on an object are NOT EQUAL!

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=

• There IS a change in MOVEMENT!

### Balanced Force

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• Forces acting on an object ARE EQUAL.

=

=

• There is no change in movement.

• NET FORCE = 0

1.

3.

4.

2.

### Newton’s Laws of Motion

• 1. Inertia of Rest & Inertia of Motion

• 2. Acceleration

• 3. Action-Reaction

### Law 1: INERTIA OF REST

• An object at rest will stay at rest until acted upon by an UNBALANCED FORCE.

• Possible unbalanced forces: Tiger Woods, the wind

### Law 1: INERTIA OF MOTION

• An object in motion will stay at the same speed, moving in the same direction unless an unbalanced force acts upon it.

• Possible unbalanced forces: water, gravity