3-30

Class began today with time lotted for those groups who have not yet submitted their Amusement Park Physics Questions power points presentations electronically to upload them to Mr. Manning's server space. For those who still have not done so, the instructions are as follows:

Log on to your server space using your login name (consisting of the your graduating class, followed by the first six letters of your last name, followed then by the first two letters of your first name) and password (your student identification number). Once logged in, select the folder titled Home, followed by Staff, followed by Manninch, followed by Student Data, followed by Period 5. Once in the folder for fifth period, simply drag your file (assuming that you have it saved to the desktop) into the folder and you're solid.

For the remainder of the class period, we worked on pages ten and eleven, problems one through four. The answers are as follows:

1) While boarding the upper platform of a stationary automobile trailer, a 2003 FOCUS overshot the end of the trailer and sailed out horizontally over the driver’s cab. The FOCUS was traveling at a speed of 18 m/s at a height of 5.6 meters as it left the platform.

a) How long did t take for the FOCUS to hit the ground? 1.06s b) How far did the FOCUS go horizontally before hitting the ground? 19.1 m

2) The FLASH was cruising along one day, daydreaming, when he ran horizontally off a cliff. He hit the ground (unharmed, of course) 4.6 s later and 6032 meters from the base of the cliff.

a) How high was the cliff? 103.7 m b) What was his initial horizontal speed as he ran off the cliff? 1311 m/s c) What was his vertical speed just as he hit the ground? 45 m/s d) Referring to #2 above, what was the FLASH's resultant velocity (both magnitude and direction) just as he hit the ground. 1311.8 m/s @ 1.97° above the ground

3) In order to save his girlfriend, Sally truelove, from a horrible fate at the hands of Rufus W. Rongdoer, Alligator Brandee must knock out the knothole in Sally's prison dor within 5 s!! He is on a platform, which is 17 meters above the target and 200 meters aay. Assuming that he hits the knothole,

a) How long does it take the arrow to hit the knothole? Does he make it on time? 1.86s → yes b) At what speed did the arrow have to leave the bow? 107.5 m/s

4) Eggbert, the Eccentric Elephant, climbs to the top of a stone outcropping in his pen at he zoo. He decides to throw his peanuts at the gawking visitors who are standing 32 meters from the base of the small cliff on which he's standing. (The cliff is 5 meters high.) If he launches the peanuts with a maximum horizontal velocity of 30 m/s, will Eggbert endanger the well-being of the onlookers, or will his efforts be in vain. Horizontal v = 30.3