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WorksheetsPhysics Midterm
Total questions: 65
Worksheet time: 16hrs 15mins
What is the relationship between velocity and acceleration?
What is a hypothesis?
law
formula
suggested explanation
What is a theory?
a hypothesis that has been verified by a large number of independent experiments
the truth
an opinion
What is displacement?
the change in position of an object
how much an object moves
the way that an object moves
What is a vector?
a quantity that has both magnitude and direction
a quantity that only has direction
a quantity that only has magnitude
What is speed?
scalar quantity
vector quantity
What is acceleration?
change of velocity per unit of time
change in speed
how much an object speeds up
What is the value of acceleration due to gravity?
9.81 m/s2
9.8 m
9.81 m.s
What is shown here?
Push contact force
Pull contact force
Electrical force
Which diagram best shows person pushing a couch (accelerating) across the floor?
The down-arrow in this diagram is most-likely:
gravity
normal
a push or pull
friction
Motion is the result of ____ force
balanced
no
unbalanced
The amount of matter in an object is
pressure
weight
mass
Friction is a force that acts in an ___________ direction of movement.
similar
opposite
parallel
What does the solid line on this graph represent?
Constant speed
Acceleration
At rest
A ball is tossed straight up into the air and falls straight back down. Neglecting air resistance, at what point is the acceleration the greatest?
Just after it was thrown
At the peak height
The same everywhere
What does the slope of a position versus time graph give you?
position changes
velocity
acceleration
This is a velocity-time graph. What is the object doing in segment A?
Speeding up
Slowing down
Constant Velocity
What is happening between 2 and 3 seconds?
The object is not moving.
The object is not accelerating.
The object is slowing down.
What is happening at E?
Stationary
Accelerating
Steady speed; returning to start position
Every morning, Tom walks along a straight road from his home to the bus stop. Below, is a graph representing Tom’s trip to school.
- What is the distance covered through the second segment, which is between 50 seconds, and 70 seconds?
40 meters
60 meters
80 meters
Which graph is showing acceleration (getting faster)
D
E
both D and E
A car is traveling to the right with a speed of 29 m/s when the rider slams on the accelerator to pass another car. The car passes in 110 m with constant acceleration and reaches a speed of 34 m/s. We want to find the acceleration of the car as it sped up. What equation should you choose?
v=vo+at
d=vot+1/2at2
v2=vo2+2ad
*A boat travels 12.0 m while it reduces its velocity from 9.5 m/s to 5.5 m/s. What is the magnitude of the boat’s acceleration while it travels the 12.0 m?
1.3 m/s2
2.5 m/s2
3.0 m/s2
A car starts from rest and accelerates uniformly over a time of 5.21 seconds for a distance of 110 m. Determine the acceleration of the car. Choose the appropriate equation.
v=vo+at
d=vot+1/2at2
v2=vo2+2ad
The unit we use to measure speed is ___.
m/s
m
s
*A golf ball starts with a speed of 2 m/s and slows at a constant rate of 0.5 m/s2, what is its velocity after 2 s?
0 m/s
0.5 m/s
1 m/s
*How long would it take a car, starting from rest and accelerating uniformly in a straight line at 5 m/s2, to cover a distance of 200 m?
9.0s
10.5s
12.0s
*A dog basks in the sun when he sees a squirrel and bolts after it. If the dog accelerates at +1.6 m/s/s, how far does he run in 3 seconds?
4.8 meters
45 meters
7.2 meters
What happens to the velocity of a ball as it is dropped off a cliff?
It decreases at a uniform rate
It increases at a uniform rate
It is constant
A policeman traveling 19.5 m/s spots a speeder ahead, so he accelerates his vehicle at a steady rate of 1.81 m/s2 for 3.2 s, at which time he catches up with the speeder. What distance does the police car cover in that time?
d = vit + ½ at2
35.98 m
56.32 m
71.67 m
The best reference points are stationary (not moving).
true
false
Stickdude traveled from A through B, C and D back to A. What was his total distance traveled?
16 m
8 m
0 m
Position
a specific point in space
the amount of space between one point and another
the change in position of an object
How can you tell if an object is in motion?
the object will look different
I'll be able to see the forces
Its position will change in relation to other objects
What is the total displacement of the object represented in this motion graph?
5 meters
4 meters
2 meters
Which lists metric units, in order, from smallest to largest?
milligram, centigram, gram
kilogram, gram, centigram
decagram, hectogram, milligram
Which Branch of Physics is most important when studying the results of a car crash?
Mechanics
Waves & Wave mechanics
Relativity
The prefix "centi" means: ____________________
1 x 10-2
1 x 102
1 x 10-1
Which Branch of Physics is most important when determining how much voltage is produced by a wind turbine?
Mechanics
Waves & Wave mechanics
Electromagnetism
Which Branch of Physics is most important when studying how air conditioners cool your house?
Mechanics
Optics
Thermodynamics
This variable in the experiment is the one being deliberately changed by the scientist
dependent variable
independent variable
data
In a controlled experiment, how many independent variables can be worked with at a time?
one
two or more
however many makes sense
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...
The type of plant
The amount of sunlight
The type of liquid
7,000 g = ____ kg
70
700
7
What is scientific notation?
A long way to write really short numbers
A short way to write really long numbers
I don't know...
Which of the following is correct scientific notation?
20.35 x 104
.2035 x 104
2.035 x104
Americans drink 5,604,000 gallons of sweet tea each day. How many liters is that? (1 gal = 3.79 L)
21,200,000 L
21,240,000 L
21,207,190.2 L
You know 1000 mg = 1 g. Convert 2.5 grams into milligrams.
25 mg
25,000 mg
2500 mg
Convert 40 ounces to pounds. (16oz = 1lb)
2.5 pounds
.4 pounds
2/5 pounds
This bullseye demonstrates...
High Accuracy & High Precision
High Accuracy & Low Precision
Low Accuracy & High Precision
To what order of magnitude is kilo?
-2
4
3
This is a valid equation: ma=v2, where m has units of meters, a has units of m/s2, and v has units of m/s.
True
False
This equation is not valid: v = at, where v has units of m/s, a has units of m/s2, and t has units of s.
True
False
Solve -2 = 4r + s for s.
s = -2 + 4r
s = 2 - 4r
s = -2 - 4r
When there is an increase in one variable and a decrease in the other, this relationship is known as
inversely proportional
directly proportional
exponential
When increasing one variable causes an increase in the other, this relationship is called
inversely proportional
directly proportional
exponential
What does
Δ mean?time
initial-final
final-initial
What are the units for velocity?
m
m/s
m/s2
What are the units for displacement?
g
kg
m
What are the units for acceleration?
N
m/s
m/s2
