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Forces And Motion
Test Description: Forces Motion Unit Review
Instructions: Answer all questions to get your test result.
1) When a car suddenly stops at a red light, a book lying on the car seat slides forward. Why does the book continue to move forward?
A
The friction of braking transfers energy to the book.
B
The car moves in reverse more rapidly than the book.
C
The book loses its backward force.
D
The book’s inertia causes it to continue moving.
2) The law requires all people riding in a car to wear seat belts. If the car suddenly stops, the seat belts hold the passengers in place. How does Newton’s first law of motion apply when a person is not wearing a seat belt?
A
The passengers will lean into another passenger’s seat.
B
The passengers will continue moving forward due to inertia.
C
The passengers will not be affected by the sudden stop of the car.
D
The passengers will move backward into the seat.
3) How does Newton’s first law of motion apply to a ball rolling across the gym floor after an unbalanced force is applied?
A
The ball will continue to roll until an unbalanced force in applied.
B
The ball will stop at the line halfway across the gym.
C
The ball will start bouncing until it hits the wall.
D
The ball will roll in a zigzag pattern to the other end of the gym.
4) A car accelerates down the road. What is the “reaction” to the tires pushing on the road?
A
the mass of the car pushing on the tires
B
the road moving away from the tires
C
the air in the tires moving the car
D
the road pushing on the tires
5) Imagine you could throw a ball in a frictionless environment such as outer space. Once you let go of the ball, what will have happened to the ball according to the Law of Inertia (Newton’s 1st Law)?
A
It will travel in a straight line forever.
B
It will slow down and turn.
C
It will continue to speed up forever.
D
It will travel in a straight line but eventually slow down.
6) What is the force needed to accelerate a 10kg object at 2 m/s2?
A
20 N
B
0.2 N
C
2 N
D
5 N
7) Which of the following describes (states) an object that is speeding up? The object is ________.
A
in a frictionless environment
B
decelerating
C
accelerating
D
moving with constant speed
8) A ball rolls across a smooth surface at a steady (constant) 0.5 meters per second (m/s). What is its acceleration?
A
9.8 m/s2
B
2 m/s2
C
0.5 m/s2
D
0
9) What does it take to change the direction or speed of an object?
A
more than one force
B
no force
C
an unbalanced force
D
a balanced force
10) If there is no force acting on an object, it will______
A
move at the same speed
B
move with the same speed AND direction
C
eventually slow down and stop
D
move in the same direction
11) A bird flies 50 meters in 10 seconds. What is its speed?
A
0.2 meters per second
B
5 seconds per meter
C
0.2 seconds per meter
D
5 meters per second
12) Which of the following is used to measure speed?
A
meters
B
meters per second
C
seconds
D
seconds per meter
13) A car is traveling south on the highway at 55 mph. It passes several road signs and a bus that is heading north on the same highway. Which reference point is best used for describing the motion of the car?
A
the driver of the car
B
the driver of the bus
C
a tire on the bus
D
a road sign beside the highway
14) A student drives 50 miles north from the starting line of a race, then drives 60 miles going south. Which best describes the student’s displacement from the starting line?
A
10 miles south
B
110 miles south
C
10 miles north
D
110 miles north
15) Which best describes the change in position of an object’s location compared to a reference point?
A
vector
B
speed
C
acceleration
D
motion
16) Mason is watching his friends race dirt bikes. Which proves his friends are in motion on their dirt bikes?
A
Each bike has a maximum speed of 60 mph.
B
Each bike has six gears.
C
Each bike has mud on the tires.
D
Each bike just passed the finish line.
17) Which is MOST likely needed when describing the change in position of an object?
A
initial speed
B
constant rate
C
direction change
D
reference point
18) Jerry saw a car parked in front of his house early in the day. Later that day, he saw the same car parked in front of a neighbor’s house that is two houses away from his house. How does Jerry know the car has moved?
A
Jerry guessed the neighbor ran errands and parked the car in a different location upon returning.
B
Jerry assumed since it was later in the day, the car had moved.
C
Jerry compared the car’s present location with its past location.
D
Jerry was told earlier in the day that the car would be moved, and he accepted this story as evidence.
19) David is new to Holly Middle School and was given a map to find his classes. He starts from the school office and walks south 50 meters to his science class. Which best represents David’s reference point?
A
50 meters
B
map
C
science class
D
school office
20) A car moves at a constant speed of 40 mph for 20 minutes. The car stops for a train for 10 minutes, then resumes a constant speed of 40 mph for another 20 minutes. Which best describes the motion of the car over the 50-minute trip?
A
no acceleration → increase of 40 mph → constant speed
B
constant speed → increase of 10 mph → constant speed
C
constant speed → no motion → constant speed
D
constant speed → constant speed → no motion
*select an answer for all questions
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