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AP Physics 1 > Chapter 11 > Flashcards

Chapter 11 Flashcards

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AP® Physics flashcards Physics 101 flashcards
1
Q

Force

A

push or pull applied by one object and experienced by another

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2
Q

Net force

A

= all forces acting on object

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3
Q

What adds together for net force?

A

forces in the same direction

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4
Q

What subtracts from the net force

A

forces in the acting in the opposite direction

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5
Q

Weight

A

force of planet on an object near that planet

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6
Q

force of friction

A

force of a surface on an object

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7
Q

friction force acts _ to surface

A

parallel

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8
Q

kinetic friction

A

force of friction when something is moving along the surface

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9
Q

kinetic force acts

A

opposite the direction of motion

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10
Q

static friction

A

friction force between two surfaces that aren’t moving relative to one another

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11
Q

normal force

A

force of a surface on an object

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12
Q

normal force acts _ to the surface

A

perpendicular

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13
Q

coefficient of friciton

A

number that tells how sticky two surfaces are

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14
Q

Newton’s 3rd law

A

force of Object A on Object B is equal in amount and opposite in direction to the force of Object B on Object A

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15
Q

Newton’s 2nd law

A

object’s acceleration = (net force it experiences/mass) and is in the direction of net force

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16
Q

how is a force often measured in a laboratory

A

spring scale

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17
Q

Two aspects of force

A
  1. what objects were involved, how much force, which direction of force
  2. calculate net force acting on object to object’s change in velocity
18
Q

an object can _ a force, not _ a force

A

experience/have

19
Q

canonical

A

conforming to general rule

20
Q

free body diagram has

A
  1. labeled arrow representing each force, with each arrow beginning on the object and pointing in the direction in which the force acts
  2. List of all the forces acting on the object, indicating the object applying the force and the object experiencing the force
21
Q

Which forces can act on an object without contact?

A

gravitational and electrical

22
Q

instead of the term gravity, use _

A

weight: force of Earth on car

23
Q

all free-body diagram starts with

A

gravity

24
Q

weight acts

A

downward

25
Q

any other forces must be a result of

A

contact

26
Q

all forces must be exerted by an

A

identifiable object

27
Q

how to determine net force with acceleration in a direction

A

net force = mass * acceleration

28
Q

when an object moves along a surface, the acceleration in a direction perpendicular to that surface must be

A

net force perpendicular to the surface is 0

29
Q

kinetic friction force =

A

coefficient of kinetic friction times the normal force

30
Q

coefficient of friction

A

property of the surfaces in contact (less sticky, coefficient of friction decreases = less friction = smaller force of friction)

31
Q

coefficient of friction takes 2 forms

A

static and kinetic

32
Q

coefficient of static friction is used for something that is

A

stationary

33
Q

coefficient of kinetic friction if the object is

A

moving

34
Q

coefficient of static friction is a _ value

A

maximum

35
Q

maximum coefficient of static friction =

A
  1. find how much horizontal pushing force will just barely make the book move
  2. use formula
36
Q

how to find 3rd law companion force

A
  1. look at description of force in free-body diagram and reverse objects applying and experiencing the force
37
Q

If net force has both vertical and horizontal component, use _ to determine the magnitude of the net force

A

pythagorean theorm

38
Q

If net force has both vertical and horizontal component, use

A

tangent to determine the direction of net force

39
Q

Newton’s third law companion forces/ Newton’s third law force pair

A

force of object A on object B is equal in amount and opposite in direction to the force of object B on Object A. Those two forces are the pair

40
Q

when a force acts at an angle measured from the horizontal, the vertical component of that force is =

A

amount of the force itself * sine of angle

41
Q

when force acts at an angle measured from the horizontal, the horizontal component of that force =

A

amount of force itself * cosine of angle

AP Physics 1 (2 decks)

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