Chapters

Projectile Motion Reading Questions.

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1. A car is traveling on a horizontal road at 13 m/s when it begins to slow down at 3.0 m/s2. What is his velocity after 5 seconds? (page 1)
2. A bicyclist is moving at a constant velocity of 8.0 m/s. How much time does it take to cover 32 m? (page 1)
3. A student tosses a ball straight up at 23 m/s. How high is the ball after being in the air for 3.0 seconds? (page 2)
4. Later a baseball is hit straight up at 57 m/s. How fast is the ball traveling after 8.0 seconds? (page 2)
5. In an episode of "Mythbusters" called "Manhole Missles," the guys ignite methane in a make-shift sewer to investigate what would happen to the manhole covers. (Actually the myth busters investigated more than that, but this was really cool.) Watch this video and calculate how high two of the manhole covers traveled and their initial velocity. This video, titled "Manhole Missles," was filmed for Discovery channel's Mythbusters and published to the web on Nov 9, 2011. Its address is, http://youtu.be/7JrCYYLHQPY, and was accessed on July 5, 2014.
6. A baseball is hit with a horizontal ---> velocity of 25 m/s at a constant velocity and with a vertical velocity upwards of 35 m/s with a downward acceleration of 9.80 m/s2. What is the horizontal and vertical position of the ball after being in the air for 2.0 seconds? You must organize the givens for all projectile motion problems, (including this one,) in the table format shown on page 4 of the reading. (page 3 and page 4) 7. A football is kicked such that horizontally it will travel as a constant velocity of 15 m/s and vertically it will travel initially upwards at 25 m/s while under the influence of gravity. What is the football's velocity after 3.0 seconds? (Include the velocity's magnitude and direction.) (Page 4 and 5) 8. An arrow is shot at an angle of 33° with ground at a speed of 21 m/s off a very high ledge. What is horizontal and vertical position of the arrow after 4.0 seconds? (Do all your calculations with the 33° angle.) [Pages 6 and 7] 9. A mountain climber is holding on the edge of a vertical wall extremely high off the ground. He throws a rock off the ledge at 15 am/s with an angle of 71° from the wall. What is the rock's velocity (magnitude and direction) after 3.0 seconds? (Do all your calculations with the 71° angle.) [Pages 6 and 7] 10. Describe the physical appearance for situation where the impact speed equals the launch speed.
11. Define the 2 conditions for apogee.
12. For a situation where the a baseball lands at the same height it is thrown from, how does the time to apogee compare to the time it takes for the ball to be dropped from apogee.
13. A basketball is thrown with a horizontal velocity of 10 m/s and a vertical velocity of 15 m/s. What is the velocity of the ball at apogee?
14. What is the vertical displacement for a projectile that lands at the same height it is thrown from?
15. A lawn dart is thrown straight up and lands at the same height it is thrown from. How does the sign of initial vertical velocity compare to the sign of the vertical impact velocity?
16. For each table of givens below, where are the most probable locations of the projectile in its motion? "A" is the starting point. Table A
Vertically
Horizontally
vo
10 m/s
5 m/s
x
-3 m
t
v
a
-9.80 m/s2
Table B
Vertically
Horizontally
vo
10 m/s
5 m/s
x
0
t
v
a
-9.80 m/s2
Table C
 Vertically Horizontally vo 10 m/s 5 m/s x t v 0 5 m/s a -9.80 m/s2
Table D
 Vertically Horizontally vo x 3 m t v - 5 m/s 5 m/s a - 9.80 m/s2
Table E
 Vertically Horizontally vo 10 m/s 5 m/s x t v -10 m/s 5 m/s a - 9.80 m/s2
Table F
 Vertically Horizontally vo 10 m/s 5 m/s x - 4 m t v -15 m/s 5 m/s a - 9.80 m/s2 0
Table G (location "G" is the starting point)
 Vertically Horizontally vo 15 m/s - 5 m/s x 6 m t v - 8 m/s a - 9.80 m/s2 0

by Tony Wayne ...(If you are a teacher, please feel free to use these resources in your teaching.)