Projectile Motion Projectile Motion Projectile Motion You have probably watched a ball roll off a table and strike the floor. What determines where it will land? Could you predict where it will land? In this experiment, you will roll a ball down a ramp and determine the ball’s velocity using a photogate. You will use this information and your knowledge of physics to predict where the ball will land when it hits the floor. Figure 1 objectives ● Measure the velocity of a ball using a photogate and computer software for timing. ● Apply concepts from two-dimensional kinematics to predict the impact point of a ball in projectile motion. ● Take into account trial-to-trial variations in the velocity measurement when calculating the impact point. Materials Macintosh or Windows PC plumb bob LabPro ramp Logger Pro meter stick or metric measuring tape Vernier Photogate Target ball (1- to 5-cm diameter) masking tape Carbon paper, clean white sheet paper Preliminary questions 1. If you were to drop a ball, releasing it from rest, what information would be needed to predict how much time it would take for the ball to hit the floor? What assumptions must you make? 2. If the ball in Question 1 is traveling at a known horizontal velocity when it starts to fall, explain how you would calculate how far it will travel before it hits the ground. 3. A computer-interfaced photogate can be used to accurately measure the time interval for an object to break the beam of a photogate.. If you wanted to know the velocity of the object, what additional information do you need?
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- Summer '08
- Projectile Motion, Velocity, impact point, photogate Click