Motion Graphs

What is a D-T graph?

Distance-Time graph

What is a V-T graph?

Velocity-Time graph

What is accuracy?

Accuracy describes how close your experiment was to the true value. %dev

What is precision?

Precision describes exactness and repeatability of multiple experimental measurements. %diff

What is Random error?

Results from small variations in measurements due to randomly changing conditions. It effects your precision. Eg, Temperature

What is systematic error?

Results from consistant bias in measurements. It effects your accuracy.

What is Percent deviation?

Compares how accurate your experimental results are to the actual true results.

%dev equation

(Experimental value - theoretical value)x100/ theoretical value.

What is percent difference

Compares your experimental results to calculate precision.

%diff equation

Max difference in measurement x100/average measurement

How do you find the instantaneous distance. (D-T)

By reading the d-t graph.

How do you find the speed/velocity. (D-T)

By calculating the slope.

What does the area under a (D-T) slope give you?

Nothing.

How to you find an instantaneous velocity (Curved D-T).

Find the slope of a tangent.

What is a tangent?

A line that touches the curve of a line.

How to find the average velocity?

Slope of a secant that connects 2 points together.

What is a secant?

A line that connect 2 points on a line.

Distance summary. (Constant velocity)

Horizontal- not moving
Slanted forward- moving forward
Slanted backwards- moving backwards.

Acceleration summary. (Curved)

Up left- speeding up
Down left- slowing down.

How do you find the instantaneous velocity? (V-T)

By reading the graph

How do you find the acceleration (V-T)?

Calculate the slope.

How do you calculate the distance/displacement (V-T)?

By calculating the area.

What is a vector?

Quantities with direction.

What is a scalar?

Quantity without direction.

What is distance?

The measure of total travel regardless of direction.

What is displacement?

The net travel measured from its starting point to its end point. Straight line.

What is speed?

The distance travelled per unit time.

What is velocity?

Displacement per unit time. Requires direction.

How to calculate slope?

Rise / run

What unit is instantaneous distance in?

M

What unit is velocity/speed in?

M/s

What unit is area found in?

M

What unit is acceleration found in?

M/s2

What unit is instantaneous velocity found in?

M/s