Is distance or displacement a vector?
Displacement
Is speed or velocity a vector?
Velocity
How do you indicate a negative acceleration?
Negative sign (or south or east direction)
What is gravity on Earth?
-9.8 m/s2
If you walk 2 feet north, 3 feet west, 3 feet south, and 3 feet east, what is your displacement?
-1 feet (or south 1 foot)
A speedometer is an example of __________ speed.
Instantaneous.
What is the equation for calculating acceleration?
(vf-vi)/t
What is an abbreviation to remember sine, cosine, and tanget in reference to measuring the opposite, adjacent, or hypotenuse sides?
Soh-Cah-Toa
A flat line on a distance vs time chart means an object is what?
Not moving.
What is the unit of measurement for velocity?
m/s
The slope of the line on a velocity vs time graph shows what?
acceleration
While projectile motion refers to both the y-axis and x-axis, the two calculations must be considered __________________.
independently.
The steeper the line on a distance vs time graph, the faster the ____________.
Velocity.
If you have a vehicle moving across a length of 150 m in 21 seconds, what is the speed of the object?
Answer: v = x/t
v = 150/21
v = 7.14 m/s
What is the unit of measurement for acceleration?
m/s2
If a projectile is launched horizontally from a height of 7 m with an initial horizontal velocity of 3.5 m/s. How much time will it take the projectile to land?
Answer: Find the time it spend in flight
y = y0*t + ½*ay*t^2
-7 m = 0*t + ½*(-9.8)*t^2
-7 = -4.9*t^2
1.429 = t^2
t = 1.195 s
If Sally walks 4 blocks North from her starting point then walks 3 blocks East. What is her overall displacement?
Answer: x = (a2) + (b2)
x = (42) + (32)
x = 16 + 9
x = 25
x = 5 m
If you're moving at 50 mph on a perfectly round race track, in physics are we measuring speed or velocity?
Velocity
How long will it take a car traveling 30 m/s to come to a stop if its acceleration is 3 m/s2?
t = (vf - vi) ÷ a
t = (0m/s-30m/s)÷(-3m/s2)
t = -30 m/s ÷ -3m/s2
t = 10 s
If a projectile is launched horizontally from a height of 7 m with an initial horizontal velocity of 3.5 m/s. How far away will the projectile land from the edge of the table?
Now calculate the length away from the table it will fall
vx = x/t
3.5 = x/1.195
3.5*1.195 = x
x = 4.1825 m