Newton's Laws

Study guide for Newton's Laws notes

Newton’s First Law

An object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force

Newton’s Second Law

Force = Mass x Acceleration

Newton’s Third Law

For every action there is an equal and opposite reaction

Force

A push or pull on an object that causes motion (Measured in Newtons)

Intertia

The tendency of an object to resist a change in its motion

Balanced Forces

All objects acting on an object are equal, resulting in no change in motion

Unbalanced Forces

Forces that produce a nonzero net force, which changes an object’s motion

Net Force

The sum of all forces acting on an object

Mass

The amount of matter in an object

Acceleration

The rate at which velocity changes over time; an object accelerates if its speed, direction, or both change

Velocity

Speed in a given direction

Rest

The state of an object when its not in motion

Force

A push of pull that acts on an object

Newtons

Unit of measurement for force

The more mass an object has, the more ____ the object has

Inertia

_____ ____ Are harder to start and stop

Bigger objects

The more force placed on an object, the more it will _____

Accelerate

The more ___ an object has, the more force it takes to accelerate the object

Mass

Forces are always produced in pairs with ____ directions & ____ Strengths

opposite, equal

What law is this?: When a car stops suddenly, the passengers still feel forward motion. This is due to the inertia of motion whereby the car begins to stop while the body inside is still in a state of motion

Newton’s First law

What law is this?: When you turn off a table fan, the blades continue to move for some time even without electricity

Newton’s First Law

What law is this?: A dirty dish lying on the table will not move or get cleaned unless you apply some force and put it in the dishwasher.

Newton’s First Law

What law is this?: When we kick a soccer ball in a specific direction, we are exerting force on the ball. The harder we kick, the more force we apply, and the farther the ball goes.

Newton’s Second Law

What law is this?": In racing cars, engineers try to keep vehicle mass as low as possible. This means with lower mass more acceleration can be provided. If the acceleration is higher, the chances of winning the race are also increased.

Newton’s Second Law

What law is this?: During a car accident, the force between the car and the obstacle is known as impact force. This force depends on the masses of colliding vehicles and the speed at which they are moving. This means that if a bigger and heavier vehicle moving with greater speed is involved in a collision, the intensity of the impact force will be greater.

Newton’s second Law

What law is this?: While swimming or moving in a rowboat, when you push the water backward, there is an equal and opposite force generated which causes forward motion.

Newton’s Third Law

What law is this?: Birds also fly using the Third Law of Motion. The wings of the bird push the air, creating an upward force which helps them move forward. Airplanes and helicopters also use this technique.

Newton’s Third law

What law is this?: When you sit in a chair, you are constantly pushing on the chair with a downward force. The chair is also pushing you back with an upward force; otherwise, the chair would collapse and you would fall.

Newton’s Third Law

Spring Scale

Used to measure Newtons