123 School Work

Projectile Motion using Photogates

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  I.     Introduction: In today's physics lab, the goal was to predict and to verify the range of a ball launched at an angle by using the equations for two-dimensional motion. To do this, we had to predict were we thought the ball would land on the floor after it has been launched and determine the initial speed of the ball. This was done by shooting the ball and measuring the speed using photogates. Using the equation y(t) = yo +(vo sin Q)t gt2 were y(t) = 0 when the ball hits the floor and yo is the initial height of the ball above the floor.
  II.     Method: To perform this experiment, clamp the minilauncher to the tabletop so that the angle of launch can be readable. Set the angle to for the projectile to 30 degrees or higher, we choose to do 40 degrees. Check to make sure that the photogate jack is connected to the photogate timer and if it is set up correct. To be able to have good calculations, hang the plum bob from the launcher barrel and let it hang down just above the floor, mark the position on the floor and measure the distance to be the ball lands after it is projected from the launcher...