Virtual Lab on Projectile Motion



Name_________________________________________Phet Projectile Motion Virtual LabGo to: Goals: Students will be able to Predict how varying initial conditions affect a projectile pathUse reasoning to explain the predictions. Explain projectile motion terms in their own words. Describe why using the simulation is a good method for studying projectiles.Everyday Physics in your life:1. As you get ready for bed, you roll up one of your socks into a tight ball and toss it into the laundry basket across the room. Then, you try to toss the other sock without rolling it up. What affects whether or not your socks land in the basket?510032020701000Develop your understanding: left535940002. Click on the Intro screen to test your ideas about the things that affect the landing location of a projectile.-6540524447500Some Helpful IconsFire Button-6159521209000Eraser (clears settings)-6512922362500Scope (to measure flight path)1905-63500 Zooms the screen in/out for full viewingPlay around with this simulation to get a better understanding of it BEFORE starting this lab. Think of different factors that may affect where an object lands in this simulation. Change the angle and height of the cannon and add or remove air resistance to various objects.As you are getting familiar with the lab, fill in the table below:Note: You can drag the target to various places where you think your object will land. ObjectFactors affecting landing of objectHow did the different variables affect the landing position of this object?1. ? Air Resistance (y/n) __________? Cannon angle _______________? Cannon height (from ground) ______________? Initial Speed (m/s) _______________2.? Air Resistance (y/n) __________? Cannon angle _______________? Cannon height (from ground) ______________?Initial Speed (m/s) _______________3.? Air Resistance (y/n) __________? Cannon angle _______________? Cannon height (from ground) ______________? Initial Speed (m/s) _______________4.? Air Resistance (y/n) __________? Cannon angle _______________? Cannon height (from ground) ______________? Initial Speed (m/s) _______________What is meant by the expression “flight path of a projectile”? Draw a general flight path of one of the objects from the table above. (make sure the trajectory (path) of the object resembles a parabola!) For one point on the trajectory: Draw the horizontal and vertical vectorLabel the time, range and height Flight path of _______________ projectile4. Why do you think using the simulation is a good method for studying projectiles? Include any examples the simulation provides that are helpful. ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Procedure A: What is the effect of Initial Velocity on the motion of a projectile?1. Select an object to fire from the cannon (see drop-down box @ top right of screen) Your object: __________________________________2. Set the angle of the cannon to 45 degrees and drag cannon down to 0 mcenter9525003. Set the initial velocity to 5 m/s 4. Record your guess in meters (target location) in the table below5. Move the target to where you think the object is going to land. At this point do not move the target5. Select the FIRE button and watch your object’s flight path. 6. Drag the SCOPE button to the flight path of your object to record data in your table.7. Clear your settings and repeat steps 2 – 6 for the different velocitiesNOTE: Do not change your object Initial velocityYour guess for target location(meters)Maximum Horizontal Range(meters)Maximum Vertical Height(meters)Time of flight(seconds)5 m/s10 m/s??15 m/s?20 m/s??30m/s??When the velocity was increased which of the data table measurements of the projectile motion also increases?Describe the shape of all the projectile paths in this part of the lab? In general, if the projectile lands at the ground in a certain amount of time (t), approximately when will the projectile reach its maximum height?Notice the difference between your target range guess and where the object actually landed. What do you think caused the difference? Procedure B: What is the effect of Launch Angle on the motion of a projectile?Clear the page and set these variables:??? Initial Velocity = 3o m/sUse the same object!Repeat steps from above but changing the angle of the cannon. Keep the velocity at 30 m/sAngle of LaunchYour guess for target locationMaximum Horizontal RangeMaximum Vertical HeightTime of flight(degrees)(meters)(meters)(meters)(seconds)25????????? ????????? 30??????? ??????? 40???? ???? 45????????? ????????? 50??????? ??????? 60???? ???? 70????????? ????????? 80??????? ??????? 90???? ???? 1. At what angle was the maximum range (horizontal distance) reached? 2. At what angle was the maximum elevation achieved? 3. At what angle was the greatest "hang" time achieved? 4. Compare the maximum range (horizontal distance) reached for these pairs of launch angles.25o = __________ meters and 65o = __________ meters35o = __________ meters and 55o = __________ metersWhat pattern is observed for these angles and their maximum ranges? What is the sum of these paired angles?5. Explain two major ideas you learned about projectile motion from this virtual lab investigation in your OWN words: ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download