Definitions
A quantity that is defined by magnitude only
What is a scalar?
This is what a position vs time graph looks like for a person who is not moving
What is a horizontal line?
This is the displacement of a man who walks 50m north, and then turns around and walks 30m south
What is 20m north?
This is the final velocity of a cyclist after accelerating in a race at 15 m/s^2 for 20s
What is 300m/s?
Bumblebee jumps straight upwards with a velocity of 14.0 m/s. What is his displacement of after 1.80 s?
9.32 m
A quantity that is defined by Magnitude and Direction
What is a vector?
This is what a velocity vs time graph looks like for a person moving at a constant velocity
What is a horizontal line? (not at zero)
This is the speed of a man who walks 50m in 10s
What is 5m/s?
This is the kinematics equation you would use to solve a question like:
A car travelling 30m/s slams on the breaks with an acceleration of -7m/s^2 and comes to a stop. Determine the distance the car traveled.
What is vf^2=v0^2 + 2a(xf-xi)
or
vf^2-v0^2= 2a(xf-xi)
A surprisingly spherical decepticon is rolled up a constant slope with an initial velocity of 9.3 m/s. What is the acceleration of the decepticon if its displacement is 1.9 m up the slope after 2.7 s?
-6.4 m/s^2
Vector quantity that refers to the change in an objects position, from start to finish
What is displacement?
This is what a position vs time graph looks like for a person who is moving at a constant velocity
What is a straight line? (not horizontal)
This is the acceleration of a car that accelerates from 40m/s to 50m/s in 5 seconds
What is 2 m/s^2?
This is the equation you would use to solve a question like:
An arrow leaves a bow with a velocity of 500 m/s. While accelerating the arrow moves a distance of 1 m. Determine the acceleration of the arrow.
What is vf^2=v0^2 + 2a(xf-xi)
or
vf^2-v0^2= 2a(xf-xi)
Luigi jumps straight upwards at 15.0 m/s. How high is he when he is travelling at:
a) 8 m/s upwards?
b) 8 m/s downwards?
8.2 m for both
An object that is being accelerated only by gravity
What is free fall?
This is what a velocity vs time graph looks like for an object with negative acceleration
What is a straight line with negative slope?
This is the velocity of a woman who walks 500.0 m North in 6.0 min
What is 1.3m/s North?
This is the time it would take a ball dropped from a height of 1.5 meters to hit the ground
What is .55s?
While strolling along on Planet X an astronaut decides to throw a hammer and a feather upwards at 5.0 m/s. They both return to the point of release in 3.0 s. What is the acceleration due to gravity on Planet X.
-3.3 m/s^2
Designated by a positive or negative sign on a vector quantity
What is direction?
This is what a position vs time graph looks like for an object that is accelerating
What is a curve?
This is the speed *in m/s* of a car that drives 600.0 miles in 6 hours (0.6 miles is 1km)
What is 50 m/s?
This is the speed of a jogger after accelerating at 1.6 m/s^2 for 24 s
What is 38 m/s?
Princess Toadstool stands on the edge of a 30.0 m high cliff. She throws Bowser upwards at 20.0 m/s. If Bowser falls all the way to the bottom of the cliff, find: a. his velocity when he hits the ground. b. the time it takes to hit the ground.
-31.4 m/s
5.24 sec