Metric Units and Graphing Basics
Convert 800hm to micrometers.
8x1010 um
Which graph feature gives us information about an object's position when looking at a position-time graph?
A car moving at a velocity of 24m/s slows down at a rate of 2m/s2 for 6 seconds. Calculate the final velocity of the car.
vf=12m/s
An object is launched at a velocity of 14m/s at a 65 degree angle. Calculate the horizontal and vertical components of this velocity.
vx = 5.92m/s
vy = 12.69m/s
Ms. Deppmeier's favorite color.
What is purple?
Convert 0.003pm to centimeters.
3x10-13 cm
Which graph feature gives us information about an object's acceleration when looking at a velocity-time graph?
Slope
A rock is thrown straight upward at 28m/s. Calculate the maximum height reached by the object.
hmax = 40m
When a projectile reaches the maximum height of its trajectory, what kinematic value is implied?
The vertical component of the velocity will be zero at the max height. (Note: For 2D motion, the horizontal component of the velocity will still be non-zero.)
Ms. Deppmeier's favorite animal.
What is a raccoon?
Indicate how to calculate the units for slope and area under the curve on a graph. Justify your answer.
Slope is the change in vertical variable divided by the change in horizontal variable, so slope units equal vertical units divided by horizontal units.
Area under the curve is based on the area formulas which are variations of base times height, so area under the curve units equal vertical units times horizontal units.
Sketch a position-time graph that shows the motion of an object that is moving in the negative direction and slowing down.
Graph should include a negative slope and be a continuous, concave up curve.
A car moving at 27m/s has a minimum stopping distance of 70m. Calculate the maximum rate of acceleration of the car.
a = -5.21m/s2
A projectile is launched from the ground at 14m/s at a 25 degree angle. Calculate the total final velocity (magnitude and direction/angle) of the object when it returns to the ground.
vf = 14m/s at -25 degrees
Ms. Deppmeier obtained her physics degree from this university.
What is Montana State University?
When calculating area under the curve, how do you determine which areas should be added and which should be subtracted?
Add areas above the horizontal axis and subtract areas below the horizontal axis.
Sketch a velocity-time graph that shows the motion of an object that is moving in the positive direction and slowing down.
Graph should have a negative slope and the line should be above the horizontal axis.
A rock is thrown downward at 3m/s from the top of a 50m tall cliff on an alien planet. It takes 4.5 seconds for the rock to reach the ground. Calculate the acceleration due to gravity on this planet.
a = -3.60m/s2
A projectile is launched horizontally at 35m/s from the top of an 18m tall building. Calculate the horizontal distance traveled by the projectile before it reaches the ground.
Delta x = 67.08m
What sport does Ms. Deppmeier play?
Fencing (but with old swords)
Convert 450nm to megameters.
4.5 x 10-13 Mm
When given the initial position of an object and a velocity-time graph of the object's motion, how can the final position of the object be determined?
Calculate the area under the curve of the graph to determine the displacement of the object, then add the displacement to the initial position to determine the final position.
A rock is thrown straight up at 5m/s from the top of a 20m tall platform. Calculate how long it takes for the rock to reach the ground at the bottom of the platform.
t = 2.59s
A ball is thrown at 24m/s at a 60 degree angle from the top of a 15m tall cliff. Calculate the total final velocity (magnitude and direction/angle) of the ball when it reaches the ground.
vf = 29.50m/s at -65.99 degrees
This current 8th grader's mom married Ms. Deppmeier.
Who is Ben?