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Mrs. Rakowski/Mr. Walsh
Core Physics
Newton’s Laws
Answer the following questions using complete sentences. Be brief and
to the point. The following terms may be helpful in your explanation:
Slowing down
Speeding up
1. What is the SI unit used for force? ________________
2. What is the SI unit for mass?_________________
3. By observing the motion of an object, how can you tell if the forces
acting on the object are balanced?
4. What happens to the motion of an object when the forces on it are
5. Use Newton’s Laws to explain each situation below. Do not just state
the law, explain what is happening.
a. A block of wood lies undisturbed on a table.
b. A rocket soars skyward as its engine fires.
c. A gust of wind blows an arrow in flight off target __________
For each of the following statements below, State whether it is true
or false. If the statement is false, cross out the incorrect word(s)
and replace it with a word that will make the statement correct. For
example if the statement was “Mrs. Rokozak is my physics teacher,
You would correct it by crossing out Rokozak and replacing it with
Rakowski and Walsh.
6. An object in motion remains in motion at an unchanging speed unless a
balanced force acts upon it.
7. If there is an unbalanced force acting on an object, it moves in the
direction of the unbalanced force.
8. For every action there is an equal and opposite reaction.
9. A ball will fall to the ground at a constant speed because of gravity.
10. If I punch Moe in the face and he gets a black eye, it means that I
exerted a bigger force on him than he did on me.
11. An object is said to have no change in motion if it
Is not changing velocity
is not moving
is not changing speed
both a and b
all of the above
12. The Newton is the SI unit of:
a) force b) energy c) pressure d) mass
14. The tendency of an object to remain at rest or in motion is called:
a. inertia. b. momentum. c. velocity. d. mass.
15. The velocity of an object changes if
a. its speed changes
b. its direction changes
c. either its speed or direction changes
d. neither its speed nor its direction changes.
16. Which of the following is an example of a balanced force?
a. person skating back and forth
b. tire with treads gaining speed on an icy road
c. book resting on a desk.
17. Which of the following describes acceleration?
the change in the position of an object compared with a
reference point.
the distance an object moves in a given amount of time
the speed of an object in a specific direction
The change in the velocity of an object over time
18. When an object falls to the ground,
a. it has no mass.
b. no forces are acting on it.
c. it has no weight.
d. its weight causes it to accelerate.