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Physics Semester 1 Final 2024 Flashcards | StudBud
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Physics Semester 1 Final 2024
Physics Semester 1 Final 2024
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1
Given the centripetal acceleration and velocity vectors shown below, which direction is the car traveling?
towards the north
towards the west
towards the east
towards the south
2
Which is a correct statement of Newton's First Law?
An object in motion will slowly stop if given enough time
An object at rest will stay at rest until acted on by an outside force
An object in motion will accelerate until acted on by an outside force
Inertia is a force that keeps objects from moving
3
Which of these describes TENSION?
the support force supplied by a surface, that is perpendicular to it
the force that resists two objects sliding against each other
the force in a rope or chain that is pulling on an object
the force of gravity on an object
4
Potential energy _____.
depends on how fast an object is moving
never changes
cannot be measured
is energy stored in a gravitational field or a spring or chemcial bonds
5
Which of these is an example of a safety measure designed to reduce stopping force?
Empty choice
Empty choice
Empty choice
All of the answers are examples of increased stopping time to reduce force
6
When is an object in free fall?
When it's in equilibrium
When it reaches terminal velocity
When the net force on it is zero
When it is falling due to gravity, with no air resistance
7
Momentum is a _____
vector
scalar
8
If a physics problem tells you that an object moves 2 meters every second, which variable are you being given?
speed v
displacement Δx
time t
acceleration a
9
Josie drops a 2kg stone from the top of a building 6m in the air. The stone has a speed of 8 m/s when it hits the ground
Mechanical energy is not conserved. The stone should have a higher speed
Energy is conserved, since 6 + 2 = 8
Mechanical energy is not conserved. The stone should have a smaller speed
Energy is conserved: the amount of kinetic energy at the ground = GPE
10
How do we define a quantity that measures the amount of matter/ atoms in an object, that does NOT change with location?
weight
force
magnitude
mass
11
Which of these objects has Kinetic energy?
A bowling ball on a very high shelf
A straw in a cup
A ball rolling down a hill
coins in a jar
12
When is an object in equilibrium?
When two or more people are pushing on it
When it accelerates
ONLY when no forces are acting on it
When the net force equals zero
13
The position vs time graph shows a car traveling along a road. During which segment is the car accelerating?
D
The car is not accelerating at any time
C
A
14
Which of the following is a SCALAR that describes an object's change in position?
Magnitude
Displacement
Distance
Velocity
15
What does Momentum equal
Momentum=Mass x Acceleration
Momentum= Velocity x Quality
Momentum= Mass x Velocity
Momentum=Mass x Volume
16
Why are you asked to learn the metric system?
Almost the entire rest of the world uses it
It is the standard for science at SFHS
It is the standard for physics at SFHS
All three of the other answers are correct.
17
The energy of MOTION is called
electrical
radiant
potential
kinetic
18
Given the centripetal acceleration and velocity vectors shown below, which direction is the centripetal force?
towards the south
towards the east
towards the west
towards the north
19
What does the law of conservation of energy state?
All energy can be used to make coffee
All energy is cool
All energy is created and destroyed
All energy is constant in the universe and cannot be created or destroyed
20
A person runs around a 400-meter track and winds up in the same spot they started. What is their displacement?
it depends on which direction they ran
0 meters
4000 meters
400 meters
21
Which is a correct statement of Newton's Third Law?
An object will not apply a force to another unless it accelerates
An object at rest tends to stay at rest
An object feels force from another that is equal to the force it applies
An object feels a force from another object only when they are in contact
22
Which car shown below starts with a constant velocity, but then accelerates?
B
D
A
C
23
In physics an impulse is....
Equal to a change in velocity
When you want something and you buy it right away
When things move
Equal to a change in momentum
24
If a problem tells you that an object increases its speed by 2 m/s every second, which variable are you being given?
speed v
displacement Δx
acceleration a
time t
25
A person runs around a 400-meter track and winds up in the same spot they started. How much distance did they travel?
0 meters
4000 meters
400 meters
it depends on which direction they ran
26
What is the physics definition of impulse?
change of the potential energy of an object
change of the momentum of an object
change of the position of an object
change of the mass of an object
27
Which of these describes a NORMAL force?
the force of gravity on an object
the support force supplied by a surface, that is perpendicular to it
the force that resists two objects sliding against each other
the force in a rope or chain that is pulling on an object
28
Bart threw a baseball straight up in the air, and it is now in free fall on its way down. What is its acceleration?
-4.9 m/s/s
9.8 m/s/s
0 m/s/s
-9.8 m/s/s
29
What is the SI unit of energy?
kilogram
Joule
Watt
Newton
30
What is the net force on this object?
5 N to the left
25 N down
25 N up
5 N to the right
31
Calculate the gravitational potential energy
16.15 joules
1615 joules
15, 800 joules
158 joules
32
Energy is _____.
the ability to cause change or do work
destroyed when it changes
anything that takes up space or has mass
only found in lightning
33
Which of Newton's laws says that all objects with mass are attracted to each other?
Newton's Law of Universal Gravitation
Newton's Third Law
Newton's Second Law
Newton's First Law
34
Bart threw a baseball straight up in the air. While it is on its way up, what is its acceleration?
-9.8 m/s/s
9.8 m/s/s
-4.9 m/s/s
0 m/s/s
35
Which car shown below has a constant velocity for the entire trip?
D
B
A
C
36
In physics, mass and weight are:
Smaller on the Moon than on Earth.
Different concepts, measured in different units.
The same thing
Different concepts, measured in the same unit
37
Which car shown below has an acceleration that points to the left?
D
A
C
B
38
Which of these describes FRICTION?
the force that resists two objects sliding against each other
the support force supplied by a surface, that is perpendicular to it
the force in a rope or chain that is pulling on an object
the force of gravity on an object
39
If this object has a mass of 2 kg, what is its acceleration?
5 m/s/s to the left
5 m/s/s to the right
2.5 m/s/s to the left
2.5 m/s/s to the right
40
Which of the following objects is NOT in equilibrium?
A rock lying on a desk
A train moving on a level track at a constant 30 m/s
A football in free fall
An elevator moving upward at a constant speed
41
Which of the following is a VECTOR that describes an object's change in position?
Distance
Velocity
Displacement
Magnitude
42
Which is a correct statement of Newton's Second Law?
Force & acceleration are inversely proportional
Force & acceleration directly proportional: if one increases they both do
Mass & acceleration directly proportional: if one increases they both do
43
What is gravitational potential energy?
Energy that is created by the inertia of an object
Potential energy from the position of an object in a gravitational field
Another term for kinetic energy
Gravitational potential energy doesn't exist
44
Which of these describes WEIGHT?
the force that resists two objects sliding against each other
the force of gravity on an object
the force in a rope or chain that is pulling on an object
the support force supplied by a surface, that is perpendicular to it
