# Newton's Laws Newtons Laws Sir Isaac Newton Studied physics in the late 1600s Developed laws about force and gravity Discovered that a prism could separate light into the color spectrum and vice-versa and proved that color

is a property of light Founded calculus Newtons First Law An object at rest stays at rest and an object in motion stays in motion unless acted on by an outside unbalanced force.

Think about slamming on the brakes in the car the car slows down, but you dont locks the seatbelt. Inertia Inertia the tendency of an object to resist a change in its motion

In order to overcome an objects inertia, a force must be exerted on the object. Greater mass=greater inertia Newtons 1st Law is also called the Law of Inertia Newton's First Law of Motion Newtons Second Law Force

equals mass x acceleration F=ma Explains how objects behave when forces are unbalanced Newtons Third Law Forces come in

pairs For every action, there is a reaction Newtons Third Law Think about A rocket being launched

Newton's 3rd Law Galileo Galileo was a scientist who studied math and physics in the late 1500s and early 1600s in Italy He showed that objects with unequal

masses would fall to the ground at the same time by doing an experiment at the Leaning Tower of Pisa Galileo Drops the Ball Mass and Weight Mass is the amount of matter in an object usually measured in g or kg Mass does not change with gravity

Weight is the force of gravity on an object measured in N Weight changes with gravity, so it can be different in different places Calculating Weight Fg=weight Fg=mg This formula is on your reference table

The value of g is on your reference table Calculating Weight An object with a mass of 12kg on Earth will have a mass of 12kg on the moon. Calculate the weight of the object on earth. Fg=mg Fg=12kg

9.8m/s2 = 117.6N Calculating Weight An astronaut has a mass of 90kg. Find his weight if he is in a flight simulator with a gravitational pull of 1.0m/s2. Fg=mg

Fg=90kg 1.0m/s2 = 90N