Starter- recap 1) What can forces do?. Balanced and Unbalanced Forces - Learning Objectives: - Explain how forces affect the motion of an object Starter:

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Presentation transcript:

Starter- recap 1) What can forces do?

Balanced and Unbalanced Forces - Learning Objectives: - Explain how forces affect the motion of an object Starter: Find the forces

Learning outcomes All: List the four states of motion List the four states of motionMost: Describe the state of motion of an object considering the forces acting on in Describe the state of motion of an object considering the forces acting on inSome: Explain, using Newton’s First Law, the state of motion of an object Explain, using Newton’s First Law, the state of motion of an object

Representing forces Arrow size = Arrow size =magnitude Direction given Direction given Sunday, 20 March 2016

Representing Forces A force is a vector quantity. It always has a size (magnitude) and direction. We represent the force using an arrow the length of the arrow represents the size of the force the direction of the arrow represents the direction of the force.

Tug of War Objects can have more than one force acting on them These forces can act in different directions The forces can be balanced or unbalanced

Newton’s First Law “An object remains at rest or at a constant velocity unless acted upon by unbalanced forces” 1) Accelerating- unbalanced 2) Decelerating- unbalanced 3) Constant speed- balanced 4) Stationary- balanced

What could the car be doing? 1) Accelerating 2) Decelerating 3) Constant speed 4) Stationary States of motion

Accelerating Constant speed Decelerating

In what other state of motion would the forces be balanced?

Balanced/Unbalanced 1) Just fallen out of plane 2) Just opened parachute 3) Floating down nearly landed

Resultant forces- Which way will the box move?