formulas & such
what is the formula for speed ?
speed = distance / time
convert 4.25 km to meters
4.25 km X 1000meters/km = 4250 meters
During an experiment, hoiw can you make the data more reliable ?
By repeating the experiment. [multiple trials]
what goes on the y axis on a distance time graph ?
distance
name three things that you need to bring to class every day
2 pencils
notebook
eraser
ruler
calculator
what is the formula for distance ?
distance = speed X time
convert 2.5 hours to minutes
2.5 hours X 60minutes / hour = 150 minutes
During an experiment, how do you make sure it is a fair test ?
A fair test is ensured by changing only one independent variable while keeping all other conditions (controlled variables) exactly the same.
what does constant speed look like on a distance time graph ?
a straight, non-horizontal, line
what is the definition of deceleration ?
to slow down
what equipment is used to measure time ?
a stopwatch / timer
calculate the speed of an object that traveled 2,225 kilometers in 2.7 hours
824km/hr
what is a dependent variable in an experiment ?
A dependent variable is the factor being measured, observed, and recorded in an experiment, which changes in response to manipulations of another variable
what does stationary look like on a distance time graph ?
a horizontal line
what is the definition of stationary ?
to NOT change place over time
what is the formula for time ?
time = distance / speed
calculate the speed of an object that traveled 32.0 meters in 2.5 seconds
12.8m/s
what is an independent variable in an experiment ?
An independent variable is the factor in an experiment that is intentionally changed, manipulated, or controlled by the researcher to test its effect on another variable
how can you tell which speed is faster when looking at a multistep journey on a distance time graph ?
the graph of the faster speed is steeper
how can an average be calculated ?
add all numbers in a data set together and divide the sum by the total count of those numbers
what equipment is used to measure distance ?
a meter stick, ruler , measuring tape
convert 360 km / hr to meters / second
360 km / hr = 100 meters / second
what is a control variable in an experiment ?
A control variable (or controlled variable) is any factor in a scientific experiment that is intentionally held constant.
what does it look like when an object or person returns to the starting point on a distance time graph ?
the line on the graph goes down to 0 distance
calculate the average of these numbers:
15.2 14.1 14.5 12.9 14.3
71 / 5 = 14.2