First Law of MotionInertia

A force is a push or a pull

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

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

rest / constant motion

First Law of Motion

First Law of Motion

First Law of Motion

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.

First Law Quiz

First Law of Motion

Adding Collinear Forces

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.

Adding Collinear ForcesTwo 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.