2nd Law of Motion Quizizz Lesson

2nd Law of Motion Quizizz Lesson

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. In the formula, what do the letters stand for?

• F = force, m = meters, a = amplitude

• F = force, m = mass, a = acceleration

• F = net force, m = mass, a = acceleration

• F = force, m = mass, a = amplitude

Multiple Choice

2. To accelerate means to

• keep your speed and/or direction the same.

• change your speed.

• change your direction.

• change your speed and/or direction.

Multiple Choice

3. What is an independent variable (IV)?

• A variable you are changing to see if it makes a difference.

• A variable you are measuring to see if the IV made a difference or not.

• A variable you keep the same so it does not influence the results.

Multiple Choice

4. What is a dependent variable (DV)?

• A variable you are changing to see if it makes a difference.

• A variable you are measuring to see if the IV made a difference or not.

• A variable you keep the same so it does not influence the results.

Multiple Choice

5. What is a constant or controlled variable?

• A variable you are changing to see if it makes a difference.

• A variable you are measuring to see if the IV made a difference or not.

• A variable you keep the same so it does not influence the results.

Multiple Choice

6. Which is true about force?

• It can be an IV because we can directly change it and see how/if that change makes a difference.

• It can only be a DV because we cannot directly change it - it is controlled by force and/or mass.

• It can only be a constant or controlled variable - we never want to change it in a situation.

Multiple Choice

7. Which is true about mass?

• It can be an IV because we can directly change it and see how/if that change makes a difference.

• It can only be a DV because we cannot directly change it - it is controlled by force and/or mass.

• It can only be a constant or controlled variable - we never want to change it in a situation.

Multiple Choice

8. Which is true about acceleration?

• It can be an IV because we can directly change it and see how/if that change makes a difference.

• It can only be a DV because we cannot directly change it - it is controlled by force and/or mass.

• It can only be a constant or controlled variable - we never want to change it in a situation.

Multiple Choice

9. When testing something, how many IVs should you have at a time?

• As many as possible to save time.

• Only one so if there is a change you know what caused it.

• In this case three because we have three factors: force, mass, and acceleration.

Multiple Choice

10. How much force had Roy been using?

• 6 kg

• 5 m/s²

• 30 N

• 30 F

Multiple Choice

11. What was the IV in Roy's experiment?

• the mass of the ball

• the amount of force used

• the acceleration of the ball

Multiple Choice

12. What was the DV in Roy's experiment?

• the mass of the ball

• the amount of force used

• the acceleration of the ball

Multiple Choice

13. What was the constant or controlled variable in Roy's experiment?

• the mass of the ball

• the amount of force used

• the acceleration of the ball

Multiple Choice

14. When we decrease force, acceleration

• decreases also.

• increases.

• stays the same.

Multiple Choice

15. When we increase force, acceleration

• decreases.

• increases also.

• stays the same.

Multiple Choice

16. Which would be an example of a proportional relationship?

• The more I lift weights the more muscle mass I form.

• The more I watch TV the less energy I have.

• The more rules I follow the less trouble I get into.

• The faster I petal my bike (more speed) the quicker I get home. (less time)

Multiple Choice

17. To get the same acceleration, when mass decreases,

• force must decrease too.

• force must increase.

• force must stay the same.

Multiple Choice

18. To get the same acceleration, when mass increases,

• force must decrease.

• force must increase too.

• force must stay the same.

Multiple Choice

19. When filling in the formula triangle, what word goes on top?

• Whichever term you are solving the problem for.

• It doesn't matter - mathmatically it turns out the same no matter which term is on top.

• Force ALWAYS needs to be on top.

Multiple Choice

20. What does the line below the word force mean mathmatically?

• add together

• subtract from

• divided by

• multiply together

Multiple Choice

21. How many formulas can you create using the formula triangle?

• just 1

• 2

• 3

• an infinite number

Multiple Choice

22. To find force, what formula do you use?

• F = ma

• F = m + a

• F = m - a

• F = m/a

Multiple Choice

23. To find mass, what formula do you use?

• m = Fa

• m = F/a

• m = F - a

• m = a/F

Multiple Choice

24. To find acceleration, what formula do you use?

• a = F - m

• a = Fm

• a = m/F

• a = F/m

Multiple Choice

25. Problem: How much force is needed to accelerate a 1400kg car 2 m/s²?

Identify: What is the acceleration in the problem?

• We don't know - that is what we are solving for.

• 1400 kg

• 2 m/s²

• There isn't one in this problem.

Multiple Choice

26. Problem: How much force is needed to accelerate a 1400kg car 2 m/s²?

Identify: What is the mass in the problem?

• We don't know - that is what we are solving for.

• 1400 kg

• 2 m/s²

• There isn't one in this problem.

Multiple Choice

27. Problem: How much force is needed to accelerate a 1400kg car 2 m/s²?

Identify: What is the force in the problem?

• We don't know - that is what we are solving for.

• 1400 kg

• 2 m/s²

• There isn't one in this problem.

Multiple Choice

28. Problem: How much force is needed to accelerate a 1400kg car 2 m/s²?

Solve it. (Hint: Use the formula triangle to know which formula to use. You may use a calculator.)

• 2800 N

• 700 N

• 1402 N

• 1388 N

Multiple Choice

29. Problem: You threw a ball with a force of 18 N and it flew with an acceleration of 4.5 m/s². What was the mass of the ball?

Solve it. (Hint: Use the formula triangle to know which formula to use. You may use a calculator.)

• 81 kg

• 4 kg

• 13.5 kg

• .25 kg

Multiple Choice

30. Which was the constant or controlled variable in this experiment?

• mass

• force

• acceleration

• there isn't one

Multiple Choice

31. Using the same force, when the mass decreased, the acceleration

• decreased too.

• increased.

• stayed the same.

Multiple Choice

32. Using the same force, when the mass increased, the acceleration

• decreased.

• increased too.

• stayed the same.

Multiple Choice

33. Which would be another example of an inverse relationship?

• When I apply more pressure (increased pressure) to my pencil the writing gets darker (increased darkness).

• When I petal harder on my bike (more energy) my speed goes up.

• As I spend more time at home on school work my number of low grades goes down.

• When I spend more time at home on school work my overall grades go up.

Multiple Choice

34. It takes ____ force to move a smaller mass.

• more

• less

• You need to use the same amount of force no matter what the mass is.

Multiple Choice

35. Box A has a mass of 100 kg. Box B has a mass of 50 kg. Which box requires more force to move it?

• Box A (more mass)

• Box B (less mass)

• They would require the same amount of force.

Multiple Choice

36. The same force has _____ affect on an object with more mass.

• less

• more

• the same

Multiple Choice

37. A force of 30 N was applied to both ball A (5 kg) and ball B (15 kg). Which ball will have a greater acceleration?

• Ball A (less mass)

• Ball B (more mass)

• They would accelerate the same amount.

Multiple Choice

38. Force and mass have a(n)

• proportional relationship.

• inverse relationship.

• There is no relationship between force and mass.

Multiple Choice

39. When the force on an object becomes ____, the object will slow down.

• less

• more

• force does not affect acceleration

Multiple Choice

40. Boy A applied 10N of force to a box. Boy B applied 20N of force to the same box. Which boy made the box move faster?

• Boy A (applying less force)

• Boy B (applying more force)

• Neither - the box moved at the same speed for both boys.

Multiple Choice

41. The slower an object is accelerating the _____ force it needs to change its velocity.

• less

• more

• force does not affect acceleration

Multiple Choice

42. Football player A is running slowly and football player B is running quickly. Football player C (Roger) is going to apply a force to them to change their velocity (speed and/or direction). Which player will Roger have to apply more force to in order to change their velocity?

• football player A (running slower)

• football player B (running faster)

• Roger will have to apply the same amount of force to both of them.

Multiple Choice

43. The less acceleration an object has the _____ force it will have on other objects.

• less

• more

• The amount of accelerartion does not affect the force.

Multiple Choice

44. The side of a wall was smashed in by a car that hit it. Car A was going 20 mph and car B was going 50 mph. Which car would have had the greater affect on the wall?

• Car A (the one going slower)

• Car B (the one going faster)

• Both cars would have had the same affect on the wall.

Multiple Choice

45. Force and acceleration have a(n)

• proportional relationship.

• inverse relationship.

• There is not relationship between force and mass.

Multiple Choice

46. The same force will cause _____ acceleration on an oject with more mass.

• a greater

• less

• the mass does not affect acceleration

Multiple Choice

47. John applied a force of 50N to a 10 kg ball and then to a 7 kg ball. Which ball had a greater acceleration?

• the 10 kg ball

• the 7 kg ball

• mass does not affect acceleration

Multiple Choice

48. Mass and acceleration have a(n)

• proportional relationship.

• inverse relationship.

• Mass and acceleration do not have a relationship.

Multiple Choice

49. Can something with a really small mass ever apply a really big force?

• No - it needs to have a lot of mass.

• Yes - if the force is big enough.

• Yes - if it has a really fast acceleration.

Multiple Choice

50. Can something moving really slow ever apply a really big foce?

• No - it has to be moving faster.

• Yes - if the force is big enough.

• Yes - if it has a really big mass.