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Physics Lab Final > Final > Flashcards

Final Flashcards

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1
Q

Rule for calculating sig figs in addition problems

A

The answer have the same number of decimals as the least precise value.

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2
Q

After a projectile is fired horizontally, what direction is exhibiting non zero acceleration?

A

Along the y-axis

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3
Q

If the smallest units on your measuring tape is cm, what precision should your measurement be written?

A

Millimeters

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4
Q

T or F. The height of the projectile launcher Yo has no effect on the range projectiles

A

False

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5
Q

T or F. If an object is in static equilibrium, it has zero acceleration.

A

True

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6
Q

A lab report conclusion should incorporate

A

An evaluation of an stat error in the experiment

An evaluation of any systematic error

A statement and discussion of your results including specific data points.

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7
Q

The least count of a measurement device refers to

A

The most precise point of precision on the instrument scale

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8
Q

For a function S=x+y, what is the formula for calculation ΔP?

A

ΔΡ/P = sqrt(Δx/x)^2 + (Δy/y)^2

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9
Q

If a force of 20.0 N is applied tangentially to the rim of the cylinder of radius 4.1cm calculate the magnitude of the torque it produces.

A

τ=Fd

= (20N) (0.041m)

= 0.82 Nm

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10
Q

0.82 torque is opposed by kinetic friction of 0.100 Nm. What is the magnitude of the net torque on the cylinder?

A

Tnet = 0.82Nm - 0.1Nm

= 0.72 Nm

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11
Q

If the linear acceleration at the point of application of the force is measured at 0.00230 m/s^2, what is the angular acceleration? radius 0.041m

A

α = αt/r

0.0030m/s^2 / 0.041m rad / s^2

= 0.0561 rad / sec^2

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12
Q

Radon or stat errors can be described as

A

Errors that can arise from many small uncontrolled effects

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13
Q

In an experiment human error refers to

A

Uncorrected mistakes made by the person performing the procedure

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14
Q

Systematic errors means

A

Consistently biased errors that might be due to a flaw in the instrumentation

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15
Q

For Gaussian distributed random errors, what percentage of the measurements will be within two standard deviations of the mean?

A

95%

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16
Q

In the equation Vo = ((m+M)/m)V the term M represents

A

The mass of the pendulum

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17
Q

The momentum of an object can be defined as

A

The product of mass and velocity

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18
Q

In the eq. Vo = ((m+M)/m)V, Vo represents

A

Initial velocity of the ball before impact

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19
Q

In the eq. Vo = ((m+M)/m)V, V represents

A

The final velocity of the combined ball/pendulum system after impact

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20
Q

What is the native angular mode of Excel?

A

Radians

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21
Q

How many sig figs would you use for the results 102 - 4.18

A

2

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22
Q

How many sig figs would you use for the results 32.85 x 4.18?

A

3

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23
Q

Precision and accuracy in scientific measurement are different concepts T OR F

A

True

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24
Q

Percent error or percent difference are the same thing T or F

A

False

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25
Q

A good table should have a descriptive title and table number T OR F

A

True

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26
Q

Torque can be define as

A

T = dF

The tendency of a force to produce rotation

27
Q

A rigid body is said to be in equilibrium

A

If it is not accelerating or changing its rate of rotation

28
Q

A scale that reads 2g when nothing is on it is an example of

A

Systematic error

29
Q

The resolution of a scale (the limit of its precision) is an example of

A

Statistical error

30
Q

When performing a well made experiment, the experimenter

A

Takes careful record of the uncertainty of measurements

Changes one variable at a time to see how it affects the outcome

Takes time to understand the meaning behind each part of the experiment

31
Q

In circular motion, if an object with constant mass is being acted upon by a fixed amount of centripetal force, and is moved out to a larger radius, it will increase velocity T or F

A

True

32
Q

The further a spring stretches from its rest position, the weaker the force. T or F

A

False

33
Q

The period of circular motion is the time it takes to rotate 320 degrees T or F

A

False

34
Q

What is the average velocity of an moving object?

A

The displacement of an object over the change of time in which that displacement occurred

35
Q

Percent error is

A

An evaluation of a measurement’s difference from a predicted or expected value

36
Q

For a graph of velocity vs time where acceleration is uniform, how do you derived a value for acceleration?

A

Slope

37
Q

Percentage difference is

A

An evaluation of the difference two measurements

38
Q

What are the properties of a vector?

A

Magnitude

Direction

They can be added together

39
Q

The resultant of two or more forces acting on an object is the vectors sum of those forces T OR F

A

True

40
Q

An experiment turns out an average measurement of 180+-43 compared to a known value of 180.106. This measurement would be

A

Accurate but not precise

41
Q

Random error tend to follow a Gaussian distribution T OR F

A

True

42
Q

The standard deviation and the standard deviation of the mean are the same T or F

A

False

43
Q

Accuracy and precision are exchangeable T or F

A

False

44
Q

The potential energy of the pendulum at the top of its swing should be greater than its kinetic energy in the instant after impact. T or F

A

True

45
Q

Measured or calculated values should always have the same minimum precision as their uncertainties. T or F

A

True

46
Q

Two forces acting in the same direction can generate opposing torques. T or F

A

True

47
Q

If a rigid body is rotating at a constant speed, it has a constant, non zero net torque acting on it. T or F

A

False

48
Q

A percent error is a source of statistical error. T or F

A

False

49
Q

How many sig figs 10,040?

A

4

50
Q

How many sig figs? 10.040

A

5

51
Q

How many sig figs? 0.0010040

A

5

52
Q

If you want to turn the cell reference C4 into an absolute cell reference, how would you type it into excel?

A

$C$4

53
Q

Centripetal force is

A

The force producing inward radial acceleration in a circular motion

54
Q

Systematic error is associated with

A

Biased imperfections in measuring devices

55
Q

Units of moment of inertia are

A

Kgm^2

56
Q

Torque has units of

A

Nm

mN

Kg(m/s)^2

57
Q

3 sig figs for 23951.5558

A

24000 (bar over first 0)

58
Q

Moment of inertia can be thought of as

A

The rotational equivalent of mass

59
Q

If you are asked to plot A vs B, A represents

A

The variable on the Y axis

60
Q

An object undergoing uniform acceleration will producer a linear velocity vs time graph with a slope of zero. T or F

A

False

61
Q

Uncertainty is commonly rounded to one sig fig as standard practice. T orF

A

True

62
Q

The resultant is

A

The force equivalent to two or more forces

63
Q

The equilibrant

A

A force required to put an object in static equilibrium

64
Q

Weight is

A

A vector

Physics Lab Final (1 decks)

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