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Conceptual Physics Midterm Review
Conceptual Physics Midterm Review
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1
A bus slows from 6 m/s to 0 m/s. If the acceleration is -4.3 m/s, how long will it take for the bus to stop?
2.8 sec
2.0 sec
1.4 min
1.4 sec
2
You and your friends apply a combined force of 489.5N on a piano. 1762.2J of work is done. How far did the piano move?
3.6 m
4.0 m
1.8 m
2.0 m
3
186,282 miles = ___ meters?
299,868,585.4 meters
How do i convert?
149,934,292.7 meters
299,868.5854 meters
4
The law of Conservation of Energy is: Energy can be created or destroyed.
False
True
5
Speed in a given direction
Speed
Fast
Relative
Velocity
6
88 in. = ___ miles?
0.014 miles
0.0014 miles
1.4 miles
0.14 miles
7
A leaf slows from 9 m/s to 0 m/s. If the acceleration is 2.3 m/s, how long will it take the leaf to hit the ground
7.82 secs
It never will...
5.12 secs
3.91 secs
8
A measure of how fast something is moving
Radar
Relative
Speed
Velocity
9
Air resistance does not affect the acceleration of a falling object for free fall
True
False
10
How many significant digits in 12.690?
5
4
12
2
11
A characteristic of a measured value that describes how well the results of a measurement agree with the real value.
Physics
Accuracy
Measurement
Precision
12
Resistance to change
Inertia
Weight
Motion
Force
13
The rate velocity changes with time
Acceleration
Speed
Friction
Velocity
14
An object at rest will stay at rest and an object in motion will stay in motion unless acted on by an unbalanced force.
True
False
15
Newton's First law: An object in motion will stay in motion at the same speed and direction unless:
acted by Bart
acted by newton's laws
acted by a balanced force
acted by an unbalanced force
16
You exert 4.5N of force on a book. If you do 2.7 J of work, how far have you moved the book?
0.6 mi
1.0 m
0.6 m
0.9 m
17
A push or pull
Force
Inertia
Motion
Friction
18
Define kinetic energy
energy that is created
Mrs. Chung's energy
energy that is stored
energy of motion
19
Distance Traveled per unit time
Motion
Velocity
Acceleration
Speed
20
How many significant digits in 0.000875
4
7
3
6
21
8.25 days = ___ seconds?
525,200 seconds
356,400 seconds
1,425,600 seconds
712,800 seconds
22
Velocity has no particular direction; Speed specifies direction
True
False
23
The specific name for the force exerted by a rope of a string.
Normal Force
Weight
System
Tension
24
Amount of matter in an object or a measure or the inertia of an object
Mass
Inertia
Force
Velocity
25
Your friend is 5 meters from you and chucks a ball at your face, which hits you in 1.2 secs. Find velocity of the ball.
Idk, but I have 1 less friend now.
4.17 m
2.75 m/s
4.17 m/s
26
What is the difference between speed and velocity?
speed: speed with direction; velocity: how fast something moves
speed: how fast something moves; velocity: speed with direction
27
A truck pulls a trailer for 100m while exerting 480N of force for 1 minute. Calculate the power:
1000 w
801 w
400 w
800 w
28
A box measuring 5cm by 7cm with a weight of 650N is sitting on the ground. What is the pressure exerted by the box?
92,857.145 Pa
A lot of Pa
371,428.58 Pa
185,714.29 Pa
29
The ratio of resistance force to effort force.
Effort Force
Mechanical Energy
Mechanical Advantage
Resistance Force
30
The force exerted by a machine.
Effort Force
Mechanical Advantage
Mechanical Energy
Reistance Force
31
Define potential energy
energy in Monster drinks
energy that is stored
energy that is destroyed
energy of motion
32
Isaiah rides his motorcycle at 20 m/s for 500 seconds. How far does he ride?
100,000 m
1,000 m
100 m
10,000 m
33
Define work
force x time
Force x distance
the force
time x distance
34
Bart ran 5000 meters at 6 m/s. How long did he run?
433.3 secs
833.3 secs
Why you little... (chokes)
83.3 secs
35
The rate at which the velocity is changing
Slope
Acceleration
Free Fall
Speed
36
Air Resistence is friction, or drag, that acts on something moving through the air
False
True
37
A car starts at 10 m/s and accelerates at 3 m/s until it reaches 20 m/s. How long does this take?
3.33 secs
5 secs
10 secs
6.66 secs
38
For every action there is an equal and opposite reaction.
False
True
39
Law of conservation of momentum: "momentum is not concerved when there is no external force"
True
False
40
Force that opposes motion between two surfaces
Mass
Friction
Inertia
Weight
41
How many significant digits in 10000.00
1
5
2
7
42
Sarah backstrokes at 8 meters/second. How long will it take her to swim 200m?
20 sec
30 sec
25 sec
15 sec
43
Applying equal net force to two objects with different masses, the smaller mass will accelerate more.
True
False
44
Pressue is the amount of force per unit area
True
False
45
What is the acceleration of a 300,000 kg plane before takeoff when the thrust for each engine (4 on plane) is 30,000N?
0.4 m/s2
0.5 m/s2
1.0 m/s2
0.7 m/s2
46
Two interacting forces are called action force and reaction force
True
False
47
True or False: Applying a large net force to an object wil result in a larger acceleration.
False
True
48
Speed and Velocity are the same thing.
True
False
49
The acceleration of an object depends on the force acting on it and the mass of the object. F=MA*2
True
False
50
velocity = (gravity)(time)
True
False
51
Newton's second law of motion:
The speed of an object depends on the force on it and its mass
F = MA
The acceleration of an object depends on the force on it and its weight
The acceleration of an object depends on the force on it and its mass
52
Kya runs for 3 seconds at an average speed of 6.5 m/s. How far does she travel?
6.5 m
13.0 m
19.5 m
26.0 m
53
Speed of an object with a direction
Acceleration
Velocity
Force
Speed
54
To move with respect to the sun and stars
Relative
Speed
Velocity
Elliptical
55
Measure of gravitational attraction or force or gravity pulling one object toward the center of another object
Weight
Gravity
Mass
Force
56
True or False: Force and Pressure are the same things.
False
True
57
Falling objects drop with acceleration of 10m/s. How long will it take to reach 49 m/s?
4.9 sec
5.0 sec
9.8 sec
2.5 sec
58
The force a user exerts on a machine.
Efficiency
Energy
Effort Force
Resistance Force
59
The ratio of output work to input work.
Mechanical Advantage
Mechanical Energy
Effort Force
Efficiency
60
Momentum = inertia in motion
False
True
61
Define power
work / time
time / work
work / distance
the rate at which work is done
62
What is the mechanical advantage of a pulley that takes 223N of force and outputs 1784N of force?
6
7
9
8
63
mechanical energy is the energy due to the position of something, or the movmement of something
False
True
64
What is the potenial energy of a 45 Kg weight that is moved 0.016km on Earth?
4,291 J
14,392 J
10,239 J
7,056 J
65
A man hits a golf ball (0.2 kg), accelerating at 20 m/s
2
. What amount of force acted on the ball?
3N
4N
2N
5N
66
Newton's Third law of Motion:
For every action there is an unequal and opposite reaction
For every action there is an equal and alike reaction
For every action there is an apple falling on your head
For every action there is an equal and opposite reaction
67
How many significant digits in 5000?
5
3
1
4
68
The force that pulls on objects and causes acceleration if the objects are not balanced by an opposing force
Gravity
Acceleration
The urge for an A
Inertia
69
Force that opposes motion between two surfaces
Force
Friction
Inertia
Motion
70
A bird flies at a speed of 2.3 m/s
2
. If it has 14J of kinetic energy, what is its mass?
5.29 Kg
9.32 Kg
7.92 Kg
A chonk birb
71
How much work is done on a 75N bowling ball when you carry it for 10m?
750 J
75 J
0.75 J
7,500 J
72
Explain how motion is relative.
Just give me an A Mrs. Chung.
Everything in motion revolves around the earth.
motion = relative. BOOM!
Everything is in motion and its motion is relative to something else.
73
Applying a larger net force to an object will result in smaller acceleration.
True
False
74
The result of unbalanced forces
Acceleration
Speed
Gravity
Motion
