Lesson on 1st Law of Motion

Lesson on 1st Law of Motion

Ms. Renee - 8th Grade Science

This Lesson contains your notes and your review all together.

Read the slides that have information - these are the notes.

Answer the questions - these are the review.

This is mastery assignment. You need make a 90% or higher. Repeat the lesson unitl you do.

Multiple Choice

1. Which best describes Newton's First Law?

• A. An object in motion will stay in motion.

• B. An object at rest will stay at rest.

• Both A and B

• Both A and B UNLESS acted upon by an unbalanced force.

Multiple Choice

2. Which has inertia?

• only solid objects

• only solid objects and liquids

• all solids, liquids, and gases

• only gases

Multiple Choice

3. Which has more inertia?

• a semi-truck

• a sportscar

• a bicycle

• a skateboard

Multiple Choice

4. When you start to drive in a few years, which would be true about pulling out in front of a semi-truck?

• You can have the attitude of "He better stop! I used my turn signal and I have a right to change lanes!" Any vehicle can stop whenever it needs to if the driver is paying attention.

• You need to realize that because of his size, he may not be ABLE to stop even if he wants to! It's a physics thing! You could get crunched!

Multiple Choice

5. A net force of 25 N:

• balanced forces

• unbalanced forces

• not enough information to know

• could be either balanced or unbalanced depending upon other factors

Multiple Choice

6. A net force of 0 N:

• balanced forces

• unbalanced forces

• not enough information to know

• could be either balanced or unbalanced depending upon other factors

Multiple Choice

7. In unbalanced forces, the forces

• are always in the same direction.

• are always in opposite directions.

• can be in the same direction OR in opposite directions.

Multiple Choice

8. With unbalanced forces, an object may

• speed up, slow down, start, stop, or change directions.

• stay at rest or move at a constant speed.

• both of the other answers are correct.

Multiple Choice

9. A net force of 20 N:

• balanced forces

• unbalanced forces

• not enough information to know

• could be either balanced or unbalanced depending upon other factors

Multiple Choice

10. A net force of 0 N:

• balanced forces

• unbalanced forces

• not enough information to know

• could be either balanced or unbalanced depending upon other factors

Multiple Choice

11. In balanced forces, the forces

• are always in the same direction.

• are always in opposite directions.

• can be in the same direction OR in opposite directions.

Multiple Choice

12. With balanced forces, an object may

• speed up, slow down, start, stop, or change directions.

• stay at rest or move at a constant speed.

• both of the other answers are correct.

Multiple Choice

13. Which could describe the net force and the movement of the box?

• 0 N moving to the left

• 0 N at rest

• 50 N at rest

• 50 N moving to the right

Multiple Choice

14. Which would describe the net force and the movement of the box?

• 5 N moving down

• 5 N moving up

• 25 N moving down

• 25 N at rest

Multiple Choice

15. Which would describe the net force and the movement of the box?

• 200 N moving right

• 100 N moving left

• 100 N moving right

• 200 N at rest

Multiple Choice

16. Which would describe the net force and the movement of the box?

• 45 N moving right

• 69 N at rest

• 69 N moving left

• 45 N moving left

Multiple Choice

17. Which would describe the net force and the movement of the box?

• 234 N moving up

• 234 N moving down

• 78 N moving down

• 78 N moving up

Multiple Choice

18. Which force is greater and which direction would the box be moving?

• Force A, to the left

• Force A, to the right

• Force B, to the left

• Force B, to the right

Multiple Choice

19. Which force is greater and which direction would the box be moving?

• Force A, to the right

• Force B, to the left

• Force C, down

• Force D, up

Multiple Choice

20. Which force is greater and which direction would the box be moving?

• Force A, to the right

• Force A, to the left

• Force C, down

• Force D, down

Multiple Choice

21. Are the forces balanced or unbalanced and how might the box move?

• unbalanced, move down

• unbalanced, move up

• balanced, move down

• balanced, be at rest

Multiple Choice

22. Are the forces balanced or unbalanced and how might the box move?

• balanced, at rest

• balanced, move at a constant speed

• balanced, at rest OR move at a constant speed

• unbalanced, at rest OR move at a constant speed

Multiple Choice

23. What is the net force and which best desribes the people's movement?

• 0 N, no team is moving

• 24 N, no team is moving

• 0 N, people are moving to the left

• 24 N, people are moving to the right

Multiple Choice

24. What is the net force and which best describes the poeple's movement?

• 15 N, people are moving to the left

• 0 N, Team A let go and Team B is moving to the right

• 15 N, Team A let go and Team B is moving to the right

Multiple Choice

25. What is the net force and which best describes the people's movements?

• 5 N, moving to the left

• 5 N, moving to the right

• 25 N, moving to the left

• 25 N, moving to the right

Multiple Choice

26. What is the net force and are the forces balanced or unbalanced?

• 25 N, balanced

• 25 N, unbalanced

• 15 N, balanced

• 15 N, unbalanced

Multiple Choice

27. Which describes how the car could be moving?

• to the left or slowing down

• to the right or speeding up

• at rest or at a constant speed

Multiple Choice

28. What is the net force and are the forces balanced or unbalanced?

• 0 N, balanced

• 0 N, unbalanced

• 20 N, balanced

• 20 N, unbalanced

Multiple Choice

29. Which describes how the car could be moving?

• to the left or slowing down

• to the right or speeding up

• at rest or at a constant speed

Multiple Choice

30. How can you make an object move forever on Earth?

• Use a really, really, really large force!

• Apply the force in a vacuum.

• You can't - there are always unbalanced forces here on Earth.

Multiple Choice

31. Which would be another example of inertia in a car?

• A person lays thier books on the passenger seat. The drivers slams on the breaks and the books fly off the seat onto the floorboard.

• A person is sitting in the passenger seat. Their head goes back and hits the head rest when the driver takes off really quickly.

• A person in the backseat is not wearing a seatbelt. The driver turns a corner real fast and the person in the back slides over to the next seat.

• These are all examples of inertia.

Multiple Choice

32. Which of these would be another example of exploring Newton's 1st Law?

• Swimming laps back and forth in a swimming pool.

• Diving off of the diving board into a pool.

• Hanging onto the side of the pool while on a raft in the pool so you don't float away.