Newton's Laws Physics Girl

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Newton's Laws of Motion

Open Ended

What is the purpose of our lesson today?

Understand the relationship between force, mass, and acceleration quantitatively (mathematically).

​I can...

Newton's 1st Law

Drag and Drop

An object in motion

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in motion and an object at rest stays ​

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unless ​

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by an ​

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​

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.

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stays

at rest

acted on

outside

force

motion

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If you ​

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mass, then ​

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increases. This means an object with a larger mass will be ​

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to move and harder to change its ​

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if it is in motion.

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increase

inertia

harder

direction

motion

easier

decrease

Reorder

Reorder the following from left to right.

#1 (left) having the most inertia to #5(right) having the least inertia.

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Draw

What have you learned about Newton's 1st law?

Write/draw as much as you can in 2 minutes.

Newton's 2nd Law

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The ​

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of an object depends on the ​

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of the object and the amount of ​

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applied to the object.

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acceleration

mass

force

inertia

speed

Multiple Choice

How are speed an acceleration different?

• They aren't, speed and acceleration are the same thing.

• Acceleration is a change in speed (increase, decrease, or change direction).

• Acceleration is speed but with a direction.

• Your acceleration changes based on your inertia and speed doesn't

Match

Match the following unit to it's measure.

• $$kg$$

• $$\frac{m}{s^2}$$

• $$kg\frac{m}{s^2}$$

• $$\frac{m}{s}$$

mass

acceleration

force

speed

• mass

• acceleration

• force

• speed

Multiple Choice

If you push the square space cow with a force of 10N and it has a mass of 5kg what will be the acceleration of your space cow?

• 2 N

• $$2\ \frac{m}{s^2}$$

• 10 N

• $$10\ \frac{m}{s^2}$$

• None of the answers

Remember, you have the equation F=ma but you need to change it depending on what you are trying to find. But how did we get those units?

Using the equation a=F/m

Answer: 2m/s²

​If we replace the equation

​with the units we get

​which is the same as

​Units are like numbers, so the kg's cancel each other out like 5/5 is 1

​which is correct because it's the unit for acceleration which is what we were trying to find.

Multiple Choice

What happens to the acceleration if you increase the amount of force that you push the cow?

• increases

• decreases

• stays the same

Let's try increasing the force

a = F/m

a = 20N/5kg

a = 4 m/s²

^{I doubled the force and it actually doubled the acceleration}

​Original problem

a = F/m
F=10N m=5kg

a = 10N/5kg

a = 2 m/s²

Multiple Choice

What happens to the acceleration if you increases the mass of the cow you are pushing??

• increases

• decreases

• stays the same

Let's try increasing mass

a = F/m

a = 10N/10kg

a = 1 m/s²

^{I doubled the mass and it halved the acceleration}

​Original problem

a = F/m
F=10N m=5kg

a = 10N/5kg

a = 2 m/s²

Draw

What have you learned about Newton's 2nd law?

Write/draw as much as you can in 2 minutes.

Newton's 3rd Law

Drag and Drop

For every ​

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there's an equal and ​

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​

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.

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action

opposite

reaction

same

Open Ended

Why doesn't the ball hit Grogu (Baby Yoda) in the face?

Draw

What have you learned about Newton's 2nd law?

Write/draw as much as you can in 2 minutes.

Understand the relationship between force, mass, and acceleration quantitatively (mathematically).

​I can...

Poll

Knowledge Check

Do you know what happens to force if you

increase mass but acceleration stays the same?

• I'm confident I know

• I think I know but I'm not 100%

• I might if you said the question in a different way.

• I have no idea how you'd even figure that out.

Poll

Knowledge Check

Do you know what happens to acceleration if you

increase mass but force stays the same?

• I'm confident I know

• I think I know but I'm not 100%

• I might if you said the question in a different way.

• I have no idea how you'd even figure that out.

Poll

Knowledge Check

Do you know what happens to acceleration if you

increase force but mass stays the same?

• I'm confident I know

• I think I know but I'm not 100%

• I might if you said the question in a different way.

• I have no idea how you'd even figure that out.

​If you increase mass OR acceleration, it will increase force. If you decrease mass OR acceleration, it will decrease force.

F = ma

increase mass

same acceleration

= more force

​If you increase an object mass but don't apply more force, the object acceleration will lessen. If you decrease its mass then it's acceleration will increase. a = F/m

increase mass

same force

= less acceleration

If you increase the amount of force you put on anything (as long as it's greater than the object's inertia), it will increase its acceleration.

a = F/m

increase force

same mass

= more acceleration