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Chapters 3 & 4: Acceleration, Free Fall, Force, Weight, Drag, Newton's Laws, Flashcards | StudBud
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Chapters 3 & 4: Acceleration, Free Fall, Force, Weight, Drag, Newton's Laws,
Chapters 3 & 4: Acceleration, Free Fall, Force, Weight, Drag, Newton's Laws,
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1
The normal force is always equal to the object’s weight.
False
True
2
The motion of an object when gravity is the only significant force acting on it is referred to as ____.
terminal velocity
free fall
the law of inertia
the acceleration due to gravity
3
Astronauts on the Space Station experience weightlessness because the gravity at that altitude is negligible.
True
False
4
If an object is at rest, it will remain at rest unless acted upon by:
Fire
Friction
Inertia
An external force
5
The gravitational field at Earth’s surface causes an acceleration of _____ to any object placed there.
9.8 m/s2
9.8 N/kg
6
_____ is the force exerted by a fluid on an object traveling through the fluid
tension force
gravitational force
drag force
normal force
7
What is weight?
the perpendicular contact force exerted by a surface on another object
the force due to gravity acting downward on an object
the same as mass
the normal force observed on a scale
8
True or False: The following quote was written by Sir Isaac Newton in the General Scholium of his famous Principia.
False
True
9
If the net force on an object is zero, which of the following is true?
the object must have a velocity of zero
the object is not in equilibrium
the object is in free fall
the object is not accelerating
10
Net forces cause _____.
acceleration
velocity
11
Force is a ____.
vector quantity
scalar quantity
12
In Newton's 2nd law, the acceleration is directly proportional to which quantity?
Velocity
Distance
Mass
Force
13
When dropping a bowling ball and a feather in a vacuum, which will hit the ground first?
feather
they will land simultaneously
it depends on the acceleration due to gravity
bowling ball
14
Newton's second law states that acceleration is inversely proportional to what quantity?
Force
Mass
Velocity
Distance
15
An object accelerates in all of the following conditions except _____.
when it is in equilibrium
when it slows down
when it changes direction of motion
when it speeds up
16
When you push against a wall, the wall "pushes" back. True or false?
False
True
17
______ is the perpendicular contact force exerted by a surface on another object.
tension force
gravitational force
applied force
normal force
18
Newton's 3rd law states that forces are ______ in magnitude and _______ in direction
Equal. Equal
Equal. Opposite
Opposite. Opposite
Opposite. Equal
19
The definition of acceleration is _____.
change in postion over time
the point at which your velocity remains constant
change in velocity over time
displacement over time
20
Where is the object not moving?
15 s
5-10 s
0-5 s
10-15 s
21
Which variable did sky diver Felix Baumgartner seek to change in order to achieve a supersonic terminal velocity?
drag coefficient
mass
fluid density
frontal area
22
Newtons first law is also known as the law of ______ ?
Tractor Tires
Motion
Friction
Inertia
23
Galileo discovered that, neglecting the effects of air resistance, all objects in free fall have the same ____.
inertia
drag force
acceleration
terminal velocity
24
The sum of all the forces acting on an object is called _____.
normal force
inertia
gravitational field strength
net force
25
F=ma is associated with which of Newton's Laws?
The Law of Inertia
Newton's 2nd Law
Newton's 1st Law
Newton's 3rd Law
26
The gravitational field strength at earth's surface is ____.
9.8 m/s2
9.8 N/kg
27
In physics, a vacuum refers to ____.
a force that pulls objects toward the center of the earth
the result of centripetal acceleration
a tool for picking up dirt and debris
a space devoid of air or other matter
28
____ is the tendency of an object to resist changes in motion.
gravitational field strength
equilibrium
inertia
the sloth law
29
The slope of a Velocity-Time (VT) graph gives us ____.
Inertia
DIsplacement
Terminal Velocity
Acceleration
30
What is the acceleration due to gravity on earth?
10 m/s2
9.8 m/s
9.8 m/s2
32.2 m/s2
31
Which of the following is NOT an example of a field force?
magnetic forces
tension forces
electric forces
gravitational forces
32
How many Laws of Motion are there?
4
3
2
1
33
The force acting on each unit of mass at a given location is called _____.
terminal velocity
the acceleration due to gravity
a newton
gravitational field strength
34
When an object is in equilibrium, what can be said of its motion?
FNET > 0
acceleration equals zero
Acceleration is 9.8m/s2
Velocity is constant
35
The constant velocity that is reached when the drag force equals the force of gravity is called the _____.
terminal velocity
net velocity
net force
equilibrium
36
In free body diagrams, force vectors are drawn pointing _____ the particle.
away from
toward
either toward or away from
37
In free body diagrams, a particle (dot) or box is drawn to represent the ____ of the object being acted upon.
center of mass
velocity
direction
net force
38
When is the object not accelerating?
10-15 s
5-10 s
at 15 s
0-5 s
39
A physical representation that shows the forces acting on a system is called _____.
a free body diagram
a force body diagram
the law of inertia
the kinematic equations
40
During Apollo 15, Dave Scott performed an experiment to prove that objects fall at the same rate using a feather and a _
piece of lead
bowling ball
moon rock
hammer