Sci201 Mod 1 Case

Displacement, Velocity, and Acceleration

William J. Gould

TUI University

Abstract

In this report I will answer the questions that were given as the assignment for the case project.

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|1. Alamogordo and Cloudcroft (both towns in New Mexico) are 19.5 miles apart via US Hwy 82, a steeply uphill, twisting mountain|

|road.  An 18-wheeler makes the trip in 45 minutes.  (A) What is the truck's average speed?  Assume the truck's speed is |

|constant, since it's crawling all the way in second gear (a safe assumption).  (B) Is the truck's velocity also constant?  Why |

|or why not? |

|(A) Distance Traveled / Time of Travel = average speed |

|19.5 miles / 45 minutes = 0.43 mi/min (Trucks Average Speed) |

|(B) No, the trucks velocity is not constant because it is traveling on a twisting mountain road; because the path is not |

|constant the velocity will not stay constant. |

|2.  The M61 "Vulcan" cannon is a Gatling Gun-type weapon deployed on aircraft.  It fires a 100g, 20mm diameter projectile at a |

|rate of up to 6,000 shots per minute.  Barrel length is 170 cm, and muzzle velocity (speed of the projectile leaving the barrel)|

|is 1030 m/s. |

| a. Assuming constant acceleration, what is the mean (average) velocity of the projectile in the barrel?...