Apparatus ID: _____________________
You cocked your gun to which range: _____________________
Angle when pendulum is at lowest position: _____________________
Angles measured:
Show calculation of “muzzle speed” and its uncertainty:
Day 2
Measured value of ymax: _____________________
Assume that the ball is in free fall. Use the kinematics equations of projectile motion to predict the horizontal distance, xmax, that the ball will travel and determine the uncertainty in this distance.
Now check your prediction:
Attach your sheet with the ball hits marked by the carbon paper.
What fraction of the shots fall within 1 deviation of your prediction, (xmax
± delta x)? Statistics predict that 67% of the shots should be in this
range. What fraction of the shots fall within 2 deviations of your prediction,
(xmax ± 2 delta x)? Statistics predicts that 95% of the shots should
be in this range. So, how did your experiment work out?
This page maintained by Anne G. Young. Last modified February 13, 2004.