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First Law of Motion - PowerPoint PPT Presentation


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First Law of Motion. Inertia. Inertia. Is a property of matter that resists change in motion Resists acceleration. A force is a push or a pull. First Law of Motion. rest / constant motion. An object will remain at until an unbalanced force is exerted on it.

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Presentation Transcript
slide2

Inertia

Is a property of matter that resists change in motion

Resists acceleration

A force is a push or a pull

slide3

First Law of Motion

rest / constant motion

An object will remain at until an unbalanced force is exerted on it

A force is a push or a pull

slide7

First Law Quiz

Using the principle of interia and the first law of motion describe the benefit for having a head rest in a car.

slide12

Adding Collinear Forces

Vectors that are parallel are collinear, even if they have opposite directions.

Two people are dragging a canoe out of a lake onto a beach using light ropes. Each person applies a force of 60.0 N [forward] on the rope. The force of friction exerted by the beach on the canoe is 85.0 N [backward]. Starting with a free-body diagram, calculate the net force on the canoe.

slide13

Adding Collinear Forces

Two people are dragging a canoe out of a lake onto a beach using light ropes. Each person applies a force of 60.0 N [forward] on the rope. The force of friction exerted by the beach on the canoe is 85.0 N [backward]. Starting with a free-body diagram, calculate the net force on the canoe.