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Physics formulas Flashcards

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MCAT flashcards
1
Q

What is the linear motion equation without displacement?

A

vf = v0 + at

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2
Q

What is the linear motion formula without final velocity?

A

x = v0t + ½at2

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3
Q

What is the linear motion formula without time?

A

v2 = v02 + 2ax

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4
Q

What is the formula for average velocity when given displacement and time?

A
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5
Q

What is the formula for average velocity when given initial and final velocity?

A
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6
Q

What is the formula for acceleration?

A
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7
Q

What is the definition of a vector?

A

Physical quantities with both magnitude and direction, such as force and velocity

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8
Q

What is the definition of a scalar?

A

Physical quantities that have magnitude but no direction

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9
Q

What is acceleration?

A

The rate of change of an objects velocity

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10
Q

What is the formula for displacement when given average velocity and time?

A
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11
Q

What is the formula for displacement given initial velocity, final velocity, and time?

A
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12
Q

What is static friction?

A

The force that must be overcome to set an object in motion

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13
Q

What is the definition of kinetic friction?

A

Kinetic friction opposes the motion of objects moving relative to each other

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14
Q

What is the formula for kinetic friction?

A
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15
Q

Newtons first law of motion:

A

A body in a state of motion or at rest will remain in that state unless acted upon by a net force

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16
Q

What is the definition of Newtons second law of motion?

A

What a net force is applied to a body of mass, the body will be accelerated in the same direction as the force applied to the mass.

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17
Q

What is the formula for Newtons second law of motion?

A

F = ma

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18
Q

What is Newtons third law of motion?

A

If body A exerts a force on body B, then B will extert a force back onto A that is equal in magnitude and opposite in direction.

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19
Q

Definition of mass:

A

A scalar quantity that measures a body’s intertia

  • Represented by m
  • measured in kg
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20
Q

What is weight?

A

A vector quantity that measures a body’s gravitational attraction to earth

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21
Q

In order for an object to be in equilibrium…

A

The sum of opposing forces acting on the obkect must be equal to 0

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22
Q

What is the term and formula on a constant force acting on an object that moves a displacement?

A

Work

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23
Q

What is the formula for centripetal acceleration?

A
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24
Q

What is the formula for centripetal force?

A
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25
Q

When work is done by the system what is work positive or negative?

A

When work is done by the system work is greater than 0 (+)

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26
Q

Power:

  • Definition
  • Formula
A
  • The rate at which work is performed
27
Q

Kinetic energy:

Definition

A

The energy associated with moving objects

28
Q

Kinetic energy:

Formula

A
29
Q

Potential energy:

Definition

A

The energy associated with a body’s position (U)

30
Q

Gravitational potential energy:

Formula

A

U = mgh

31
Q

What is the formula for total mechanical energy?

A
32
Q

What is the work-energy theorem?

A

It relates the work performed by all forces acting on a body in a particular time interval to the change in energy at that time.

33
Q

Conservation of energy:

Definition and Formula

A

When there are no nonconservative forces (such as friction) acting on a system, the total mechanical energy remains constant

34
Q

Linear expansion:

A

The increase in length by most solids when heated

35
Q

Conduction:

A

The direct transfer of energy via molecular collisions

36
Q

Convection:

A

The transfer of heat by the physical motion of fluid

37
Q

Radiation:

A

The transfer of energy by electromagnetic waves

38
Q

What does the value of Q mean

A

When Q is greater than 0 it means that heat is gained

when Q is less than 0 it means that heat is lost

39
Q

Heat of transformaion:

A

The quantity of heat required to change the phase of 1g of a substance

40
Q

First law of thermodynamics

A
41
Q

In an adiabatic process when Q = 0 the first law becomes

A
42
Q

When the process has a constant volume (W=0) the first law becomes

A
43
Q

When the process is isothermal the first law becomes

A

Q = W

44
Q

What is the second law of thermodynamics?

A

In any thermodynamic process that moces from one state of equilibrium to another, the entropy of the system and environment together will either increase or remain unchanged

45
Q

What is the formula for density?

A
46
Q

Specific Gravity formula

A

no units

47
Q

Definition of pressure:

A

A scalar quantity defined as force per unit area

48
Q

Formula and unit for pressure

A

Pascan N/m2

49
Q

Definition of absolute pressure

A

The absolute pressure in a fluid is due to gravity somewehre below the surface

50
Q

Formula for absolute pressure

A
51
Q

Gauge pressure formula

A
52
Q

Continuity equation (fluids)

A
53
Q

Bernoulli’s equation

A
54
Q

Archimede’s principle

A
55
Q

What is the buoyant force equal to?

A

The buoyant force is equal to the eright of the displaced fluid

56
Q

if the weight of the fluid displaced is less than the objects weight then the object will…

A

Sink

57
Q

If the weight of the fluid displaced is greater than or equal to the objects weight than the object will…

A

Float

58
Q

Pascal’s principle definition:

A

A change in the pressure applied to an enclosed fluid is transmitted undimished to every portion of the fluid and to the walls of the containing vessel

59
Q

Formulas associated with Pascal’s principle

A
60
Q

What happens to a postive point charge in an electric field?

A

In an electric field a positive point charge will move in the same direction as the electric field vector

61
Q

What happens to a negative point charge in an electric field?

A

A negative point charge in an electric field will move in the opposite direction as the electric field vector

62
Q

Coulomb’s law

Definition:

A

A law that states that like charges repel and opposite charges attract, with a force proportional to the product of the charges and inversely proportional to the square of the distance between them.

63
Q

Coulomb’s law

Formula:

A
64
Q

When two oppositely charged parallel plates are separated by a distance an electrical field is created, and the potential difference that exists between these plates is given by the formula..

A

V = Ed

MCAT Flashcards (12 decks)

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