Red Elk jumps up from a diving board, and hits the water.
Velocity hitting the water, distance, velocity at a certain time, height to the top, graph of motion Like HFIII 3 and 4 Review GraphsOfMotion
Page 2
Student shoots a rocket straight up into the air.
Time to the top, initial and final velocities, velocity at a particular time, or elevation, greatest height. VERY like HFIII #1
Page 3
Car slows down from something to something. Like HF 2 and 7
Acceleration, average velocity, distance, time to stop, distance to stop.
Airplane speeds up from rest. (graph of motion) like HF #8, HFII #8, #10 Review GraphsOfMotion
Average velocity, time on the ground, acceleration, velocity halfway down the runway, graph of motion.
Worksheets:
HF How Far
HFII How far II
HFIII: How Far III
Lectures
Mockery of a test: Misc-MockTest.doc | Misc-MockTestAnswers.pdf
(The video links take you solutions on YouTube)
1. Black Elk leaves the diving board with an upward velocity of +5.8 m/s and strikes the water 10.0 m below the board.
A) With what velocity did he strike the water?
B) What time did it take him to reach the water?
C) To what height did he rise above the board before going down?
D) Draw a qualitative graph of the position v time, and the velocity v time for the time he was in the air:
2. A car decelerates from 34 m/s to 12 m/s in 15 seconds.
A) What was the average velocity?
B) What was the acceleration of the car?
C) What distance did the car take to do this?
D) Assuming it has the same acceleration (deceleration?) how much further will it go after it reaches 12 m/s to stop?
3. An airplane lands at 84 m/s and slows to a stop uniformly over a distance of 410 m.
A) What was the average velocity of the plane on the ground?
B) What time was the plane on the ground?
C) What was the velocity of the plane when it was halfway through the 410 m? (i.e. at 205 m)
D) Draw a qualitative graph of the position v time, and the velocity v time for the time airplane was on the runway:
Plus for the page two problem, I recommend looking at How Far III, Problem #1
3.74 s
+36.7 m/s
-36.7 m/s
68.5 m
+19.1 or -19.1 m/s
1. Helen Wheels launches a rocket in the air for a total of 7.48 seconds. What time did it spend going up? What is its initial velocity? What is its final velocity? How high did it go? What is the rocket's velocity at an elevation of 50.0 m? (Why are there two answers?)