# Projectile Motion - Cary Academy

Projectile Motion Discovery Lab – Part 1Scientific Method OverviewIntroductionA cannonball shot from a cannon, a stonethrown into an air, a ball rolling off the edgeof a table, a spacecraft circling the earth –all of these are examples of projectiles.How does the angle you launch these objectseffect their motion? The scientific methodcan help us better understand projectiles ina thorough and concise way.Name:____________________Period:_____Define the ProblemHow does angle effect the flight of a projectile?Research the TopicUsing the Internet answer the following questions. Make sure to cite your sources.Use Citation Maker for MLA citations.1. What is the name of the curved path a projectile follows and historicallywho first discovered it?2. Projectile Motion can be broken down into 2 types of motion. Do your bestto explain them.3. Should projectile motion be considered straight-line motion? Explain.

Next go to the following Internet web site: http://library.thinkquest.org/2779/While reading through the Physics of Projectile Motion re-answer some of thequestions above if you had difficulty with them. Additionally, answer thesequestions:1. Is it true that two objects, regardless of weight, will hit the ground at thesame time if dropped from the same height?2. What if two object are dropped from the same height but one is given ahorizontal push? Will they still hit the ground at the same time?3. How does the horizontal velocity of a projectile change over time? Howdoes the vertical velocity of a projectile change over time?4. By playing the game Water Balloons determine the following:a. Given a constant velocity, gravity and no wind resistance, how does theangle affect the range (horizontal distance traveled) by the waterballoon?b. Given a constant velocity, gravity and no wind resistance, how does theangle affect the height of the water balloon?c. Given a constant angle, gravity and no wind resistance, how does thevelocity affect the range (horizontal distance traveled) by the waterballoon?d. Given a constant angle, gravity and no wind resistance, how does thevelocity affect the height of the water balloon?e. Given a constant velocity, an angle of 45 degrees, and a constantgravity, how does wind resistance affect the flight of the balloon?2

Observations (We took many of these in class):Perform the experiment below, explain your results and answer the question.Hypothesis• A researched, informed guess about natural phenomenaRead the following to help you better make a guess…RangeThe horizontal distance that a projectile travels is known as the range. How far aprojectile travels depends on its horizontal velocity and its flight time.3

RangeThe range of a projectile also depends on what angle it is launched from theground. A projectile launched at 0° is thrown parallel to the ground, 45° is halfwaybetween parallel and perpendicular to the ground, and finally 90° is perpendicularto the ground. See the picture below.90° 45°0°Okay, now make a hypothesis about the following (and support it with evidence):Which angle will cause a projectile to have maximum range?4

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