Newton's Laws of Motion

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40 terms · Newton's First, Second and Third Laws of Motion


An object in motion tends to stay in motion, and an object at rest tends to stay at rest, unless the object is acted upon by an outside force.

in a straight line

An object in motion tends to stay in motion.
EX: a car driving down a road.

In space Newton's First Law acts like this

Objects will follow their natural trajectories until they are stopped by an outside force.

On earth Newton's First Law acts like this

The atmosphere will eventually slow down all moving objects, but in a vacuum (an empty space with no air or atmosphere), like space, it will be more obvious that object obey Newton's Laws.

in a fast moving vehicle

One of the most common places people feel the First Law is ???

Car or a bus that comes to a stop

Give examples of some of the most common vehicles that affect this First Law.

An obstruction in the road such as a wall or another object.

If a car is driving down the road, what sort of outside force would cause the vehicle to stop?


An outside force stops the vehicle, but the passengers, who are moving at a high speed are not stopped and continue to move at the same speed as the care. Is this true or false?

On earth

When a car hits a cement barrier (an outside force stops it from moving), the dummy, who is not wearing a seat belt flys through the windshield at the same rate of speed as the car was traveling.


What causes the dummy to eventually hit the ground?


The combination of the downward force of _________ and the horizontal force of the moving car caused the dummy to fly out and hit the ground.

In space

If this collision happened in zero g, in a vacuum, the dummy would keep on flying away from the car at 60mph in a straight line. There would be no gravity to pull him down to the ground.

Acceleration =

Force over Mass

shortened form

A=F/M or F=MA


Is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed to accelerate the object.

Newton's Second Law

A rate at which speed change (M/S/S) F = Forces expressed in N (Newton) is produced when it effects on a mass. The greater the mass amount, the greater the amount of force needed to accelerate.

Newton's Second Law

Heavier objects require more force to move the same distance than do lighter, objects.

50 kgm/s/s, which is equal to 50 newtons

Mike's car weighs 1,000 kg and is out of gas an he is trying to push the car to a station. He makes the car go 0.05 M/s/s. Figure out how many Newtons of force it takes to push the car. To find force use this equation: F=MA, so you plug in the data and get f=1,000KG x 05. m/s/s/

100 kgm/s/s which equals 100 newtons.

Bob's van is out of gas. Bob is pushing to the nearest station. His van is 2,000kg and he makes the car go 0.05 m/s/s. Use Newtons formula to complete the equation. F=MA, so plug in data and get F=2,000kgz .05 M/s/s What is the number of newtons that you have.?

Newton's Third Law

Which of Newton's Laws is the most famous of his laws.

Newton's Third Law

Every action has an equal and opposite re-action.

Newton's Third Law

This law is very important for spacetravel.

In the cold void of space

There is no air for jets to suck or for propellers to churn, yet space ships can maneuver in a vacuum.

The engines propel gas particles out the back of the space ship.

How does one maneuver in a vacuum in space?

the van pushes back

Every action has an equal and opposite reaction. When Bob pushes the van, the van ...

A =F/M

You can compute how much Bob and the van will move after 1 second

A= 100 N / 50 kg

A = 2 2 m/s/s

100 N / 2,000 kg

A= .05 m/s/s

Newtons First Law

An example of a penny Dunkin

First Law

Rollin along

First Law

Push Off

Newtons Third War

Lupersonic Ballon

Third Law

Supersonic Balloon

Newton's Second Law

Moon Shot

Newton's Third Las

Poe's Pundulum Car (no pit)

Newton's First

The Amazing Paper Pull

Newton's Third Law

Poe's Pundulum Car (no pit)

Newton's Third Law

Micky's Smappy car

Newton's First Law

Push off

Newton's Second

Car vs. Bus 2

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