Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

AP Physics > Dynamics Notes > Flashcards

Dynamics Notes Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Physics flashcards Physics 101 flashcards
1
Q

Newton’s First Law: An object has no forces acting on it. If it is at rest, it will …. If it is moving, it will continue to move in a …. at a ….

A

remain at rest; straight line; constant speed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

If a force is being exerted on an object, you must be able to identify a specific … (…) of that force. A force is not exerted on an object unless there is an identifiable specific …

A

cause (agent); cause

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Net force = …. of forces/ … force

A

superposition; resultant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

a compressed spring exerts a … force on an object

A

pushing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

a stretched spring exerts a … force on an object

A

pulling

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

the force of a fluid (gas/liquid) on a moving object is called … and points in the direction … of motion

A

drag; opposition

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

drag is large for objects moving at … or in …

A

high speeds; dense fluids

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

drag is small for objects that are … and …, moving in air, with a speed that is …

A

heavy; compact; not too great

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

thrust: when a jet/ rocket engine …. at ….; force opposite the direction in which …

A

expels gas; high speeds; exhaust gas is expelled

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

an object pulled with a constant force moves with a

A

constant acceleration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

the tendency to resist a change in velocity (to resist speeding up/slowing down) is called

A

inertia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

more massive objects have more

A

inertia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Newton’s Second Law: an object of mass m subjected to forces F1, F2, F3, … (this is not a fill-in the blank) will undergo an acceleration given by: …. where the net force is the vector sum of all forces acting on the object. the acceleration vector points in the same direction as the …

A

a = ∑F/ m; net force vector

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

1 N =

A

1 (kg*m)/ s^2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

1 lb = … N

A

4.45

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Newton’s Third Law: every force occurs as one member of an … pair of forces. Defines a force as an ….

A

action/reaction; interaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

the two members of an action/reaction pair act on two

A

different objects

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

the two members of an action/reaction pair point in … and are equal in ..

A

opposite directions; magnitude

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

friction that prevents slipping is

A

static friction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

when walking, static friction points in the … direction to prevent your foot from slipping …

A

forward; backward

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

friction when walking is static because your feet are not … even though your body is in …

A

sliding; motion;

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

cars use static friction to propel themselves as well. Car tires push .. against the road and the road surface then pushes the car tires …

A

backward; forward

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Objects at rest are in …. equilibrium. Objects moving at constant velocity are in … equilibrium

A

static; dynamic

24
Q

Your sensation of weight–how heavy you feel– is due to …. (this is …)

A

contact forces supporting you; normal force

25
Q

apparent weight (wapp) = magnitude of

A

supporting contact forces (normal force)

26
Q

in equilibrium, actual weight and apparent weight

A

are generally the same

27
Q

When wapp > w, you feel

A

heavier

28
Q

scale readings show

A

apparent weight

29
Q

a person/ object in free fall has … apparent weight

A

zero

30
Q

weighless does not mean no weight– refers to

A

no apparent weight

31
Q

static friction acts in response to an

A

applied force

32
Q

higher coefficient of static friction → greater … between object and surface, and the harder it is to make the object …

A

stickiness; slip

33
Q

coefficient of static friction applies only to …., as any static friction (besides …) would be equal to the …

A

max static friction; max static friction; opposing force

34
Q

magnitude of static friction adjusts itself so that the net force is … and the object doesn’t …

A

zero; move

35
Q

magnitude of static friction cannot exceed the ….. If the friction force needed to keep the object stationary is greater than Fs, max, the object … and starts to …

A

max; slips; starts to move

36
Q

kinetic friction has a nearly … magnitude

A

constant

37
Q

magnitude of kinetic friction force does not depend on how … the object is sliding

A

fast

38
Q

a wheel rolling on a surface experiences a form of static friction, as the portion of the wheel that contacts the surface is … with respect to the surface

A

stationary

39
Q

objects in contact have the same …

A

acceleration

40
Q

a massless string/rope “transmits” a force undiminished from one end to the other: If you pull on one end of a rope with force F, the other end of the rope pulls on what it’s attached to with a force of the ….

A

same magnitude F.

41
Q

the tension in a massless string/roe is the … from one end to the other

A

same

42
Q

for massless ropes/strings and massless, frictionless pulleys:
if a force pulls on one end of a rope, the tension in the rope equals the magnitude of the …
If two objects are connected by a rope, the tension is the same at both ends.
If the rope passes over a pulley, the tension in the rope is ….

A

pulling force; unaffected

43
Q

force diagrams represent a

A

particular instant in time

44
Q

If the sum of the forces points in the same direction as the system object’s velocity, the object ….; if it is in the opposite direction, it ….

A

speeds up; slows down

45
Q

… reference frame: one in which an observer sees that the velocity of the system object remains unchanged if no other objects exert forces on it or if the sum of all forces exerted on the system object is zero.

A

inertial

46
Q

for observers in …. reference frames, the velocity of the system object can change even though the sum of forces exerted on it is zero

A

noninertial

47
Q

Newton’s First Law: for an observer in an inertial reference frame when no other objects exert forces on a system object or when the forces exerted on the system object add to zero, the object continues moving at …. (including remaining at ..)

A

constant velocity; rest

48
Q

Inertia is the phenomenon in which a system object continues to move at …. when the sum of the forces exerted on it by other objects is …

A

constant velocity; zero

49
Q

inertia represents …, is not a …., and expresses a resistance to …

A

mass; force; acceleration

50
Q

Newton’s Second Law expresses a cause-effect relationship: force (….) is the cause of … (….)

A

cause; acceleration; effect

51
Q

coefficient of static friction is a measure of the relative difficulty of

A

sliding two surfaces across each other.

52
Q

Maximum static friction force depends on the … of the two surfaces and on the magnitude of the …. exerted by one surface on the other (same for kinetic friction)

A

roughness; normal force

53
Q

the magnitude of the static friction force is always less than or equal to the product of these two quantities:

A

0 <= fs <= mu * Fn

54
Q

Under the same conditions, the magnitude of the kinetic friction force is always … than the magnitude of the …

A

lower; maximum static friction force

55
Q

Expression for kinetic friction is applicable only for …, not … objects. It also fails for objects moving at …

A

sliding objects; rolling; high speed

56
Q

Models for static and kinetic friction assume … and … surfaces

A

rigid; consistent

AP Physics (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions