Units and Symbols
"The ball went 2 m."
What does the m stand for and what quantity does it relate to?
meters and distance/displacement
vi = 0
The slope of a velocity vs time graph is equivalent to
acceleration
A car travels with a constant velocity of 30 m/s for 20 s. How far did it travel?
x=vt
The units for speed or velocity in physics is
"...falls..."
a = -9.8 m/s2
Given this *teacher drawn* position vs time graph. Sketch the corresponding velocity vs time graph.
*teacher drawn answer*
You drop a coin into a deep well. How fast is it traveling after 2 seconds?
vf=vi+at
When someone says g is 9.8, they are referring to what quantity and with what units?
Acceleration and m/s2
"...jumps to a maximum height of 3.5m..."
(there are 2 answers, provide both)
vf = 0
a=-9.8 m/s2
A *teacher drawn* velocity vs time graph depicts a line with a negative y-intercept steadily approaching the time axis. Describe the objects speed and direction of acceleration over time.
The speed is steadily decreasing to a stop. The acceleration is constantly positive.
A race car accelerates from 40 m/s to 45 m/s over a distance of 100 m. What was its acceleration?
vf2=vi2+2ax
"A train travels west at 20 m/s and speeds up at a rate of 0.5 m/s every second."
A student reads this and writes in their notebook, "v = -20 m/s; A = 0.5 m/s"
Correct what the student wrote.
v = -20 m/s; a = -0.5 m/s2
"...travels to the right for 2.5 seconds before turning around. At 2.5 seconds..."
vf = 0
Given this *teacher drawn* acceleration graph. Sketch both the corresponding velocity vs time and position vs time graphs.
*teacher drawn*
You toss a coin upwards with speed 1 m/s. It falls 6 meters down a well. How long did it take to fall?
x=vit+1/2at2