Newton's 1st Law of Motion: The Law of Inertia

Newton's 1st Law of Motion: The Law of Inertia


Students will be able to determine the relationship between forces, mass, and the motion of objects. They will also demonstrate and explain the effect of balanced and unbalanced forces on an object in terms of gravity, inertia, and friction. 

These are your notes. Do not forget to star items when you do not understand it.

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Newton's 1st Law of Motion

Here is your video for your notes.

Source: various educators and Langhans

Newton’s 1st Law: These are the “S” in WSQ. You must have them under your video notes completed by the due date on the Unit Plan.

1.     Newton’s First Law applies to both object's _______ and ________.

2.    Newton’s First Law says

3.    Newton’s First Law is also called the Law of ____________.  ____________ describes the tendency for an object to resist change in ____________.

4. An elephant and a mouse would both have a weight of zero Newtons in gravitational-free space; however, they would still retain their “amount of matter” also known as __________. If they were moving toward you with the same speed, would they bump into you with the same effect? Why?

5. The law of inertia states that no force is required to maintain motion. Why then do you have to keep pedaling a bicycle to maintain motion?

6.    Many automobile passengers have suffered neck injuries when struck by cars from behind.

a. How does Newton’s first law of inertia apply here?

b.    How do headrests help guard against this type of injury?

7. If an elephant were chasing you, its enormous mass would be most threatening, but if you zigzagged while it followed you, the elephant’s mass would be to your advantage. Why?

8.A head-on collision occurs between a Mack truck loaded with gold and a Moped. The truck’s velocity decreases by 25km/h, while the Moped’s velocity changes from 75km/h to -75km/h,

Which vehicle has the greater inertia?
Why does the forward motion of the truck continue?
If the collision would have been between two similar Mopeds, how would the outcome be different?

9. How does the combination of a seat belt and an airbag help prevent injury in a head on collision?

10. A 7,434,342 kg meteorite slams into Mt. Everest at five times the speed of sound (that’s fast!). Why doesn’t Mt. Everest move?


Source: Langhans

HOT Question: Newton's Laws

1. A question that you are still confused about (be specific, include which part of the video, etc)
2. A question that connects the videos together (i.e. asking about the relationship between the content)
3. A question you think you know the answer to, but you want to challenge your classmates with
Use your Unit Plan to help with question starters

Source: inspired by C. Kirch