Newton's Laws

Newton's Laws

By Leah Nuckels

There was this Really Smart Scientist

There was a scientist by the name of Sir Isaac Newton that made a significant contribution to the study of physics. What he contributed became known as Newton’s Laws of Motion.

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First Law of Motion

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​The 1st Law of Motion states:

an object in motion tends to stay in motion, and an object at rest tends to stay at rest,

unless acted upon by an unbalanced force.

I-N-E-r-T-I-A

This is known as the law of inertia. Inertia is an object’s tendency to resist a change in

motion. Inertia is directly proportional to the amount of mass an object has. The larger the mass, the larger the amount of inertia.

​The first law also describes how the net forces acting on an object is equal to zero if the object is at rest or not moving.​

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Multiple Choice

What law is best described by inertia?

• 1st
• 2nd
• 3rd

Multiple Choice

• 1st
• 2nd
• 3rd

Multiple Choice

Which has more Inertia? (and takes more force to move)

• Truck

• Ant

Multiple Choice

According to Newton’s first law of motion, an object at rest that is not acted on by an unbalanced force will

• remain in motion.
• eventually come to a stop.
• change its momentum.
• remain at rest

Multiple Choice

According to Newton’s first law of motion, a moving object that is not acted on by an unbalanced force will

• remain in motion.
• eventually come to a stop.
• change its momentum.
• accelerate.

Newton's Second Law

​The 2nd Law of Motion states:

the acceleration of an object is directly proportional to the net force and inversely

proportional to its mass.

This is known at the law of acceleration.

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Force=MASS x Acceleration

With forces being equal if an object has more mass then it will accelerate at a lower rate than an object with less mass.

​

Mathematically you can calculate Newton’s 2nd Law with this formula

" Force = mass x acceleration

Subject | Subject

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Multiple Choice

What is the equation for Newton's 2nd Law?

• Force=Mass x Acceleration

• Mass=Force x Acceleration

• Acceleration=Mass x Force

Multiple Choice

When a cannon fires a cannonball we observe Newton's third law. Which is the reaction force?

• The cannon moving forward

• The cannon moving backwards

• The cannonball moving backwards

• The cannonball moving forward

Multiple Choice

Force = Mass x Acceleration

• 1st Law

• 2nd Law

• 3rd Law

Multiple Choice

• 1st
• 2nd
• 3rd

Multiple Choice

• 1st
• 2nd
• 3rd

3rd Law

The 3rd Law of Motion states:

for every action, there is an equal and opposite reaction.

This is known as the Law of Action/Reaction.

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Subject | Subject

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I react-You React Back!

There are a pair of forces acting on

an object. One force is in the opposite

direction and the other force is moving towards the object

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Multiple Choice

Action reaction forces never cancel each other out because

• They act on different objects.

• They act on the same objects

• They do not act on objects.

Multiple Choice

If two people with the same mass collide, they experience the same amount of force.

• True

• False

Multiple Choice

Action-reaction pairs can cause a change in motion.

• True

• False

Multiple Choice

Force always come in________

• waves

• triplets

• pairs

Multiple Choice

The forces in a force pair are in _______ direction

• opposite

• same

Multiple Choice

This picture shows .............

• Newton 2nd law of motion

• Newton 3rd law of motion

• Newton 1st law of motion

• I don't know

Multiple Choice

What will happen if the Action is greater than the Reaction?

• The man will fall

• The boat will sink

• Nothing will happen