Final

Question 1

Rule for calculating sig figs in addition problems

Answer 1

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

Question 2

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

Answer 2

Along the y-axis

Question 3

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

Answer 3

Millimeters

Question 4

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

Answer 4

False

Question 5

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

Answer 5

True

Question 6

A lab report conclusion should incorporate

Answer 6

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.

Question 7

The least count of a measurement device refers to

Answer 7

The most precise point of precision on the instrument scale

Question 8

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

Answer 8

ΔΡ/P = sqrt(Δx/x)^2 + (Δy/y)^2

Question 9

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.

Answer 9

τ=Fd

= (20N) (0.041m)

= 0.82 Nm

Question 10

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

Answer 10

Tnet = 0.82Nm - 0.1Nm

= 0.72 Nm

Question 11

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

Answer 11

α = αt/r

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

= 0.0561 rad / sec^2

Question 12

Radon or stat errors can be described as

Answer 12

Errors that can arise from many small uncontrolled effects

Question 13

In an experiment human error refers to

Answer 13

Uncorrected mistakes made by the person performing the procedure

Question 14

Systematic errors means

Answer 14

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

Question 15

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

Answer 15

95%

Question 16

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

Answer 16

The mass of the pendulum

Question 17

The momentum of an object can be defined as

Answer 17

The product of mass and velocity

Question 18

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

Answer 18

Initial velocity of the ball before impact

Question 19

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

Answer 19

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

Question 20

What is the native angular mode of Excel?

Answer 20

Radians

Question 21

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

Answer 21

2

Question 22

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

Answer 22

3

Question 23

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

Answer 23

True

Question 24

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

Answer 24

False

Question 25

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

Answer 25

True

Question 26

Torque can be define as

Answer 26

T = dF The tendency of a force to produce rotation

Question 27

A rigid body is said to be in equilibrium

Answer 27

If it is not accelerating or changing its rate of rotation

Question 28

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

Answer 28

Systematic error

Question 29

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

Answer 29

Statistical error

Question 30

When performing a well made experiment, the experimenter

Answer 30

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

Question 31

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

Answer 31

True

Question 32

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

Answer 32

False

Question 33

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

Answer 33

False

Question 34

What is the average velocity of an moving object?

Answer 34

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

Question 35

Percent error is

Answer 35

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

Question 36

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

Answer 36

Slope

Question 37

Percentage difference is

Answer 37

An evaluation of the difference two measurements

Question 38

What are the properties of a vector?

Answer 38

Magnitude Direction They can be added together

Question 39

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

Answer 39

True

Question 40

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

Answer 40

Accurate but not precise

Question 41

Random error tend to follow a Gaussian distribution T OR F

Answer 41

True

Question 42

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

Answer 42

False

Question 43

Accuracy and precision are exchangeable T or F

Answer 43

False

Question 44

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

Answer 44

True

Question 45

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

Answer 45

True

Question 46

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

Answer 46

True

Question 47

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

Answer 47

False

Question 48

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

Answer 48

False

Question 49

How many sig figs 10,040?

Answer 49

4

Question 50

How many sig figs? 10.040

Answer 50

5

Question 51

How many sig figs? 0.0010040

Answer 51

5

Question 52

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

Answer 52

$C$4

Question 53

Centripetal force is

Answer 53

The force producing inward radial acceleration in a circular motion

Question 54

Systematic error is associated with

Answer 54

Biased imperfections in measuring devices

Question 55

Units of moment of inertia are

Answer 55

Kgm^2

Question 56

Torque has units of

Answer 56

Nm mN Kg(m/s)^2

Question 57

3 sig figs for 23951.5558

Answer 57

24000 (bar over first 0)

Question 58

Moment of inertia can be thought of as

Answer 58

The rotational equivalent of mass

Question 59

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

Answer 59

The variable on the Y axis

Question 60

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

Answer 60

False

Question 61

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

Answer 61

True

Question 62

The resultant is

Answer 62

The force equivalent to two or more forces

Question 63

The equilibrant

Answer 63

A force required to put an object in static equilibrium

Question 64

Weight is

Answer 64

A vector