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MCAT > Kinematics and Dynamics > Flashcards

Kinematics and Dynamics Flashcards

1
Q

FPS system stands for?

A

Foot-pound-second

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2
Q

MKS system stands for?

A

Meter-kilogram-second

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3
Q

CGS system stands for?

A

Centimeter-gram-second

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4
Q

What are the units of N?

A

(kg*m)/(s^2)

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5
Q

What are the units of dyne?

A

(g*cm)/(s^2)

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6
Q

What does dyne measure?

A

Force

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7
Q

What are the units of a joule?

A

(kg*(m^2))/(s^2)

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8
Q

What are the units of an erg?

A

(g*(cm^2))/(s^2)

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9
Q

What does a joule measure?

A

Energy

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10
Q

What does an erg measure?

A

Energy

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11
Q

What are the units of power?

A

Energy/second or (kg*(m^2))/(s^3)

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12
Q

What does one angstrom measure?

A

10^(-10)m

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13
Q

What does one electron-volt measure?

A

1.6x10^(-19)J

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14
Q

What are the two components of a vector?

A

Magnitude and direction

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15
Q

What is the component of a scalar?

A

Magnitude

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16
Q

What is the difference between vector and scalar?

A

Only vector has direction

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17
Q

Sine(theta)

A

Opposite/hypotenuse

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18
Q

Cosine(theta)

A

Adjacent/hypotenuse

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19
Q

Equation to determine scalar from two vectors

A

ABcos(theta)

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20
Q

Equation to determine vector from two other vectors

A

ABsin(theta)

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21
Q

Right hand rule

A

Thumb in the direction of A, fingers in the direction of B, palm will be the direction of C

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22
Q

Is displacement a scalar or vector quantity?

A

Vector

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23
Q

What is displacement?

A

Change in position in space

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24
Q

What is the difference between displacement and distance?

A

Displacement is the net change in position and doesn’t depend on the path taken, distance is the total distance traveled and does take path into consideration

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25
Q

Is distance a scalar or vector quantity?

A

Scalar

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26
Q

Is velocity a scalar or vector quantity?

A

Vector

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27
Q

Is speed a scalar or vector quantity?

A

Scalar

28
Q

What is velocity?

A

Rate of change of displacement in a given unit of time

29
Q

What is speed?

A

Rate of actual distance traveled in a given unit of time

30
Q

Is force a vector or scalar quantity?

A

Vector

31
Q

What is the gravitational force equation?

A

Fg=(Gm1m2)/(r^2)

32
Q

What does G (universal gravitational constant) equal?

A

6.67x10^(-11) (N8(m^2))/(kg^2)

33
Q

What is static friction?

A

Force between a stationary object and the surface upon which it rests

34
Q

What is kinetic friction?

A

Force between a sliding object and the surface upon which it is sliding

35
Q

Is the coefficient of static or kinetic friction larger and why?

A

Static because objects will stick until they start moving and then will slide more easily over one another

36
Q

Is mass a scalar or vector quantity?

A

Scalar

37
Q

What is mass?

A

A measure of the body’s inertia or the amount of matter in an object

38
Q

What is weight?

A

Measure of gravitational force on a object’s mass

39
Q

Is weight a scalar or vector quantity?

A

Vector

40
Q

How are mass and weight related?

A

Fg=mg

41
Q

What are the units of acceleration?

A

m/(s^2)

42
Q

Is acceleration a scalar or vector quantity?

A

Vector

43
Q

What is acceleration?

A

Rate of change of velocity

Depends on a force

44
Q

What is acceleration on a graph of velocity vs time?

A

Tangent

45
Q

Newton’s first law

A

Fnet=0

46
Q

Law of inertia

A

An object at rest stays at rest and an object in motion stays in motion unless acted upon by another force

47
Q

Newton’s second law

A

F=ma

48
Q

Newton’s third law

A

Fab=-Fba

49
Q

Law of action and reaction

A

To every action there is always an opposite but equal reaction

50
Q

Equation for velocity of projectile

A

v=v0+at

51
Q

Equation for displacement of projectile

A

x=v0t+(a(t^2))/2

52
Q

Equation for velocity squared of projectile

A

v^2=(v0)^2+2ax

53
Q

Equation for force parallel to a plane

A

F=mgsin(theta)

54
Q

Equation for force perpendicular to a plane

A

F=mgcos(theta)

55
Q

Where does centripetal force point?

A

Into the circle

56
Q

What is the value of tangential force in uniform circular motion?

A

Zero

57
Q

Equation for magntitude of centripetal force

A

F=(m(v^2))/r

58
Q

Translational equilibrium occurs when?

A

Vector sum of all forces is zero

59
Q

Equation for torque?

A

r X F=rFsin(theta)
r= length of lever arm
F= force
theta= angle between force and lever arm

60
Q

What does torque generate?

A

Rotational motion

61
Q

What is necessary for rotational motion?

A

Torque

62
Q

Does positive torque cause clockwise or counterclockrise rotation?

A

Counterclockwise

63
Q

Does negative torque cause clockwise or counterclockrise rotation?

A

Clockwise

64
Q

What sign does clockwise rotation have?

A

Negative torque

65
Q

What sign does counterclockwise rotation have?

A

Positive torque

MCAT (31 decks)

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