Average Speed
When an object travels at a constant speed, is its average speed the same throughout?
Yes
does displacement describe distance and direction?
yes
On which axis do we plot distance on a distance-time graph?
y-axis
What is the net force of an unbalanced force?
NOT zero
What does the graph look like of an object that is at rest?
straight horizontal line
You travel 5 km, stop to rest, then travel another 1 km. It takes you 2 hours to get to your destination. What was your average speed?
3 km/hr
If an object is moving at 30 mph west, what is its velocity?
30 mph west
What does the graph look like of an object moving at constant speed?
straight diagonal line
20 N on one side and -20 N on the other side, is this balanced or unbalanced? Why?
balanced, because the net force is 0
which way would the line be moving if the object is moving back to its starting point?
moving down
What are some units of speed?
meters per second, miles per hour, kilometers per hour, etc
What is the difference between speed and velocity?
Speed describes how fast an object moves, whereas velocity describes both the speed and the direction of the object.
What does the graph look like of an object that is slowing down?
A downward curve
What does Newton's first law state?
An object at rest will stay at rest unless an unbalanced force acts on it.
An object in motion will stay in motion unless an unbalanced force acts on it.
what is the slope of an object moving backwards?
negative slope
What is the formula of average speed?
Total distance/total time
or
change in distance/change in time
Is displacement a vector? Why or why not?
The steeper the line is the more ___________ line. (vertical/horizontal)
vertical
Can balanced forces happen with moving objects too? Explain.
Yes, an object moving at a constant speed is a balanced force.
What does the graph look like of an object that is speeding up?
upward curve
What is the symbol of average speed?
v with an arrow on top
If you drive 80 miles in a straight path from your house, and then drive back to your house, what was your total distance? Displacement?
Distance - 160 miles
Displacement - 0 miles (you went back to your starting point)
zero slope
Does a heavier object have more inertia or less? Why?
can speed be negative?