Download Name

Name: Answer Key
Period: ALL
Newton’s Laws Test Review
Complete all questions and carefully read the directions.
Which of Newton’s Laws apply to each observation? Write First, Second, or Third on the line.
1. ___First____ A magician pulls a tablecloth out from under dishes and glasses on a table without
disturbing them.
2. ___First____ A person’s body is thrown outward as a car rounds a curve on a highway.
3. ___Second & Third Rockets are launched into space using jet propulsion where exhaust
accelerates out from the rocket and the rocket accelerates in an opposite direction.
4. ___First____ A picture is hanging on a wall and does not move.
5. ___First____ A person not wearing a seatbelt flies through a car window when someone slams on
the breaks because the person’s body wants to remain in continuous motion even when the car
stops.
6. ___First____ Pushing a child on a swing is easier than pushing an adult on the same swing,
because the adult has more inertia.
7. ___Second____ A soccer ball accelerates more than a bowling ball when thrown with the same
force.
8. ___Second____ A soccer player kicks a ball with their foot and their toes are left stinging.
9. ___Second & Third ____ A student leaves a pencil on a desk and the pencil stays in the same
spot until another student picks it up.
10. ___Second____ Two students are in a baseball game. The first student hits a ball very hard and it
has a greater acceleration than the second student who bunts the ball lightly.
Newton
Friction
Unbalanced Forces
Mass
Weight
Inertia
Balanced Forces
Gravity
Force
Net Force
Use the word bank above to complete questions 11 through 28.
Some words may be used more than once.
11. ___Friction____ is the force that one surface exerts on another when the two rub against each other.
12. ___Newton____ equals the force required to accelerate one kg of mass at 1 meter per second per
second.
13. ___Unbalanced Forces____ can cause an object to start moving, stop moving, or change direction.
14. ___Net Force____ is the overall force on an object after all the forces are added together.
15. ___Force____ is a push or a pull.
16. ___Weight____ is the force of gravity on a person or object at the surface of a planet.
17. ___Mass____ is the amount of matter in an object.
18. ___Inertia____ is the tendency of an object to resist change in its motion.
19. ___Balanced Forces____ are equal forces acting on one object in opposite directions.
20. ___Gravity____ is the force that pulls objects toward each other.
21. When an object pushes or pulls another object, you say that the first object is exerting a
___Force____ on the other object.
22. ___Weight____ is a measure of the force of gravity on an object.
23. Newton’s First Law of Motion is also called the Law of ___Inertia____.
24. The amount of inertia in an object depends on the object’s ___Mass____.
25. ___Balanced Forces____ acting on an object will not change the object’s motion.
26. ___Unbalanced Forces____ acting on an object will change the object’s motion.
28. When ___Friction____ occurs, the irregularities of one surface get caught on those of the other
surface.
30. 1 ___Newton____ = 1 kg X 1m/s/s
Indicate whether the statement is true or false and write it on the line.
31. ___False____ According to Newton’s second law of motion, force equals mass times weight.
32. ___True____ Friction depends on the types of surfaces involved and how hard the surfaces push
together.
33. ___False____ Newton’s third law of motion explains that forces act alone.
Identify the letter of the choice that best completes the statement or answers the question.
34. ___C____ What happens when two forces act in the same direction?
a. They cancel each other out.
b. The stronger one prevails.
c. They add together.
d. Their sum divided by two is the total force.
35. ___B____ The greater the mass of an object,
a. the more force it can exert.
b. the greater its inertia.
c. the more balanced it is.
d. the more space it takes up.
36. ___C____ Force = mass X
a. speed.
b. motion.
c. acceleration.
d. inertia.
37. ___B____ Which of the following is an example of rolling friction?
a. Your shoes on a sidewalk as you walk
b. bike tires on the road as you ride
c. a boat on the water as it sails
d. two hands rubbing together
38. ___B____ If you were on the moon, your weight would be ______________ than if you were on
Earth.
a. more
c. the same
b. less
39. ___C____ Which of the following is an example of increasing friction?
a. waxing skis
b. adding grease to gears on a bike
c. throwing sand on an icy driveway
d. oiling a squeaky door
40. ___C____ According to Newton’s third law of motion, when a hammer strikes and exerts force on
a nail, the nail
a. creates fiction with the hammer.
b. disappears into the wood.
c. exerts an equal force back on the hammer.
d. moves at a constant speed.
41. ___A____ Who was Isaac Newton?
a. a scientist
b. a trapeze artist
c. the president
d. a teacher
42. ___C____ What does Newton’s first law say?
a. An object in motion will stay in motion
b. An object at rest will stay at rest.
c. A & B
d. Neither
43. ___D____ What is Newton’s third law of motion?
a. 2 forces never act on the same object at once
b. Forces push and pull.
c. Don’t count your chickens before they hatch.
d. Forces always occur in equal and opposite pairs.
44. ___C____ When you push against a door
a. the door breaks.
b. the door does not resist.
c. the door pushes right back at you.
d. the door does not move.
45. ___B____ You can reduce friction by
a. throwing dirt on a hockey rink.
b. add oil to an engine.
c. use square wheels on rollerblades.
46. ___A____ What does force do?
a. makes objects move
c. makes objects accelerate
b. makes objects stable
47. ___C____ Which of the following is a unit of acceleration?
a. km/s
b. m/N
c. m/s/s
48. ___A____ What is friction?
a. opposing force of two objects rubbing together
b. anything that causes an object to stop accelerating
c. a bad force
49. ___B____ What is net force?
a. a force associated with the internet
b. the combined forces acting on a particular object
c. the same as inertia
50. ___B____ How many laws of motion did Newton state?
a. 2
b. 3
c. 4