QUIZ 1: Measurements and Vectors, Significant Figures, Vectors and 1D Kinematics

Question 1

Measurements that are based on human body dimensions or common movements. They are often used in informal contexts or historical settings.

E.g. handspan, cubit, arm span, pace, foot span.

These measurements are inaccurate due to variability among individuals, lack of universal standards, inconsistent application, and their practical rather than precise nature.

Answer 1

Non-standardized measurements

Question 2

➔ Also referred to as imperial units
➔ Traditionally used in the US and some other countries
➔ E.g. inch, pound, yard, square foot, cup,

Answer 2

English measurements

Question 3

➔ A measurement system acknowledged internationally.
➔ Decimal-based
➔ Originated in France

Answer 3

Metric Units

Question 4

The difference between the measure/estimated value from the true value.

Answer 4

Error

Question 5

this error refers to consistent, repeatable inaccuracies in measurements that occur due to flaws in the measurement process or equipment.

Answer 5

Systematic Error

Question 6

How many sf? 33.2

Answer 6

3 sf
All non-zero numbers are significant.

Question 7

Determining the weight using equipment with using your judgment as a second opinion

Answer 7

Judgement uncertainty

Question 8

➔ the variability in measurements that arise from unpredictable fluctuations and uncertainties inherent in any measurement process.
➔ E.g. these errors on a weighing scale can occur due to air currents, such as from an air conditioner, which can cause fluctuations in the weight reading. These variations are unpredictable and can lead to inconsistent results.

Answer 8

Random error

Question 9

Ensuring that the measurement instrument is correctly set to zero before taking readings.

Answer 9

Zeroing uncertainty

Question 10

How many sf? 2051

Answer 10

4 sf
Zeros between two non-zero digits are significant.

Question 11

How many sf? 0.0032

Answer 11

2 sf
Leading zeros are not significant.

Question 12

How many sf? 92.00

Answer 12

4 sf
Trailing zeros to the right of the decimal
are significant.

Question 13

How many sf? 540.

Answer 13

3sf
Trailing zeros in a whole number with the
decimal shown are significant.

Question 14

How many sf? 540

Answer 14

2 sf
Trailing zeros in a whole number with no decimal shown are not significant.

Question 15

How many sf? 1

Answer 15

infinite sf
Exact numbers have an infinite number of significant figures.

Question 16

How many sf? 6.02 x 10^23

Answer 16

3 sf
For a number in scientific notation: N x 10x , all digits comprising N are significant by the first 6 rules; “10” and “x” are not significant. 23

Question 17

➔ ____ quantities have magnitude but no
direction
➔ E.g. volume, area, energy, work, pressure

Answer 17

Scalar

Question 18

indicates the direction in which the vector is pointing.

Answer 18

head of the arrow

Question 18

➔ _____ quantities have both magnitude
and direction
➔ E.g. displacement, velocity, momentum,
force, lift, thrust
➔ Represented with the use of arrows

Answer 18

Vector

Question 19

represents the starting point or origin of the vector.

Answer 19

tail of the arrow

Question 20

represents the magnitude of the vector

Answer 20

length of the arrow

Question 20

Kelvin to Celsius

Answer 20

𝐶 = 𝐾 − 273. 15

Question 21

Fahrenheit to Celsius formula

Answer 21

TC = 5/9 (𝑇𝐹 − 32)

Question 21

Cardinal directions

Answer 21

North, South, East, West

Question 22

Celsius to Fahrenheit

Answer 22

( 9/5 𝑇𝐶) + 32

Question 23

● Resultant vector / resultant (FR)
➔ Vector sum of 2 or more vectors; produces the same combined effect
● Equilibrant vector (FE)
➔ Same magnitude compared to the resultant vector but in the opposite direction.

Answer 23

Vector Addition

Question 23

Celsius to Kelvin

Answer 23

K = C + 273.15

Question 24

The order in which you add
numbers does not change the
sum.

A+B=B+A

Answer 24

Commutative Property

Question 25

the way in which numbers are grouped when adding does not change the sum.

(A+B)+C=A+(B+C)

Answer 25

Associative Property

Question 26

Illustrating given vectors on a cartesian plane to visualize where the resultant vectors are located.

Answer 26

Graphical Method

Question 27

: Vectors are connected at the tail at the same point of origin
: You create a parallelogram by drawing imaginary lines parallel to each vector. Once these imaginary lines meet, a diagonal line from the same origin is drawn to the point of intersection of the imaginary lines. This diagonal line is the

Answer 27

Parallelogram method / tail to tail method

Question 28

: Because a polygon can really be formed when the resultant vector is drawn (from origin of the first vector to the tip of the final vector).
: Head-to-tail since the head of the first vector is connected to the tail of the second vector

Answer 28

Polygon method / head-to-tail method

Question 29

➔ Used when it is already confirmed that the given vectors form right angles which means they can also form right triangles
★ pythagorean theorem: used when there are right triangles present

Answer 29

Analytical method

Question 30

used to find the missing side or angle of a right triangle

Answer 30

SOHCAHTOA

Question 31

➔ Identifying the x and y component of each vector
➔ most convenient method because there is no need to draw vectors
★ rectangular resolution
★ vector addition

Answer 31

Component Method

Question 32

➔ The state of being stretched tight.
➔ The force that a string or rope exerts.
➔ Applies action-reaction repair.
➔ Ex: tug of war, hanging objects, pulleys.

Answer 32

Tension

Question 33

➔ Conducting of experiments
➔ Use of motion sensors, force tables, etc.

Answer 33

Experimental Method

Question 34

➔ Always the direct opposite of the weight of the object.
➔ The perpendicular contact force that a surface exerts on another surface.
➔ As we walk on the ground, we exert force unto it but the ground also exerts the same amount of force unto us; this is an example of normal force.

Answer 34

Normal force

Question 35

➔ The force that opposes the motion of an object
➔ Refers to the force resisting the relative motion of solid surfaces, fluid layers, material elements sliding against each other

Answer 35

Friction

Question 36

➔ The rotational equivalence of force.
➔ A force applied to a point on an object about the axis of rotation.

Answer 36

Torque

Question 37

The study of the motion of objects

Answer 37

Mechanics

Question 38

a branch of mechanics that describes the motion of objects using words, diagrams, numbers, graphs, and equations.

Answer 38

Kinematics

Question 39

Motion of an object
along a straight line.

Answer 39

Rectilinear motion

Question 40

in a vacuum space,
anything you drop will fall at the same time. But in reality, whatever has less resistance which may be through taking up less surface area will reach the ground first

Answer 40

Free fall motion

Question 43

Motion of an object along a curved path

Answer 43

Curvilinear motion

Question 44

When an object is
thrown at different angles, it can result to
different projections.

Answer 44

Projectile motion

Question 45

when you twirl something around, you have to maintain constant force for its path to be uniform.

Answer 45

Uniform circular motion

Question 46

➔ How much ground an object has covered
➔ How far you have traveled regardless of direction
➔ Total ground covered
➔ SI unit: meters (m)

Answer 46

Distance

Question 47

➔ How far out an object is.
➔ Where you are (direction) in relation to where you started.
➔ Total straight-line distance from the start to the end position.

Answer 47

Displacement