Science 10 - Physics Flashcards
What is Distance?
The amount of space between two objects or points.
What are the most measured units?
km (Kilometres) and m (Meter)
What is Time?
The duration between two events.
What is Position?
Is an object’s location relative to a reference point (starting point).
What is Uniform Motion?
Motion at a constant speed in a straight line.
What is Certainty?
When measuring record all that are digits that are certain plus one uncertain digit (an educated guess).
What is Certainty ‘Plus-One’ called?
Significant Figures (Sig-figs).
What are Defined Values (or Counted Values)?
They are numbers with an infinite number of significant digits. (ex : 15 students and 25 CDs) There are no sig-figs for this number.
In which direction does the arrow go in for Non-Decimal Sig-Figs?
Right to Left
In which direction does the arrow go in for Decimal Sig-Figs?
Left to Right
What is 0?
The undefined value.
0 is not always ________.
Significant
What is the Least Sig-Fig Rule (LSR)?
When multiplying or dividing, the answer has the same number of significant figures as the measurement with the fewest number of significant figures.
What is Scientific Notation?
Used to help with very large or very small numbers in Physics.
What is the Converting Units Rule?
Use conversion factors to eliminate by multiplication and division using brackets.
What is the Rate of Change?
A measure of how fast a quantity changes per unit of time.
What is Speed (v)?
The rate of change in distance of an object.
What is Average Speed (Vₐᵥ)?
The total distance divided by the total time for a trip.
What is Velocity?
Velocity is the change in position (displacement divided by time).
What are the Units of Velocity?
m/s & km/hr
What is Delta (Δ)?
Means a Change In:
How do you calculate Average Speed?
Step 1 ) List all given information.
Step 2) Write down the appropriate equation.
Step 3 ) Insert numbers in place of variable.
Step 4) Solve for answer, give with correct sig-figs and units.
What goes on the X-Axis?
Independent Variable
What goes on the Y-Axis?
Dependent Variable
What numbers is used to round a graph?
1 , 2 & 5
What is a Line of Best Fit?
A line that connects dots as much as possible. However, if it cannot go through all dots, equal amount of dots should be on the left and right side of the dots.
What does ‘y = mx + b’ become?
Δd = vΔt
What is Slope?
The slope of a graph is equal to rise/run.
What is Slope for Distance - Time Graphs?
The slope is equal to the velocity which is equal to distance/time.
What is Area for Distance - Time Graphs?
The area under the curve of a speed - time graph is the distance traveled.
A slope of a linear line will always be ____.
Constant
What is Instantaneous Position?
This is a one to one relationship between time and position. At one time there can only be one position.
What is Instantaneous Velocity?
This is a one to one relationship between time and velocity. At one time there can only be one velocity.
What is Distance?
How far one has traveled in trip total.
What is Position?
How far away from the starting point you are when you stop.
What is Displacement?
Is the change in position of an object.
What is Speed?
Is the change in time in distance divided by the change in time.
What is Velocity?
Velocity is the change in position divided by the change in time.
What can Speed be?
Only positive.
What can Displacement be?
Positive & Negative
What is Scalar?
A quantity that requires magnitude only (always positive).
What is Vector?
A quantity that requires magnitude and direction (can be both, positive and negative).
Scalar or Vector?
Speed
Scalar
Scalar or Vector?
Position / Displacement
Vector
Scalar or Vector?
Velocity
Vector
Scalar or Vector?
Distance
Scalar
What is Acceleration (a)?
The rate of change in velocity and is calculated by the ratio of the change in velocity to the time interval.
What is Acceleration (a)?
The rate of change in velocity and is calculated by the ratio of the change in velocity (Δv) to the time interval (Δt).
Scalar or Vector?
Time
Scalar
What is Constant Acceleration?
The same change in velocity (Δv) occurs in each equal interval of time (Δt).
How do you calculate Acceleration?
It is similar to our speed calculations. Final Velocity minus Initial Velocity over Time.
What is GUESS?
G - Givens
U - Unknowns
E - Equations
S - Substitute
S - Solve (with correct sig-figs and units)
What calculating methods use GUESS?
Speed and Acceleration
What does Deceleration signify?
A negative will be present.
