from The Physics Classroom's Physics Interactives http://www.physicsclassroom.com 10. TRUE or FALSE: The acceleration of projectile is 0 m/s/s at the peak of the trajectory. Identify the evidence which supports your answer. 11. Pick a launch speed and angle and compare the time required for the projectile to rise to the peak of its trajectory to the time for the projectile to fall from the peak of its trajectory. The Single Step button and the Vector display can be used to assist in your measurements. Repeat for other launch angles if necessary. Describe your findings. 12. For a fixed launch velocity, what launch angle (between 0 and 80 degrees) maximizes the time of flight for an angle launched projectile? In the space below, display some collected data which clearly support your answer. Set the launch speed to 30 m/s and the launch height to 0 meters. Fill in the table below to investigate the effect of launch angle on horizontal displacement. Launch Angle (deg) Horizontal Displacement (m) 10 20 30 40 45 50 60 70 80 This document should NOT appear on other websites. The Physics Classroom, All Rights Reserved