![]() ![]() you makepairs of measurements of t and h.).Ītwood's machine is shown in the diagram below. #Measuring the acceleration due to gravity lab freeFor five different arbitrary distances (measured fromthe bottom of the ball in the ball release to the top of the pad) measure five free fall times.Remember to hit reset between each measurement.The ball falls adistance measured from the bottom of the ball to the top of the plate. Finally, turn the thumbscrew counter-clockwise to release theball which should then drop on the middle of the target pad. Now make a test run by clamping a ball into the release mechanism.Close the release mechanism by pushing on the dowel pin as shown, and thentightening the thumbscrew to lock the ball in place.Place the timer so that it will not be hit by a falling ball.Position the target pad directly under the ball release mechanism.The ball release mechanism should be clamped to a stand.Theacceleration of gravity is measured by allowing a steel ball to fall, afterstarting at rest, and then applying the equation for accelerated motion.Ī free fall timer is used in this experiment. ![]() While this may seem to be the most obvious method of measuring g,it was not practical until the advent of modern electronic timers. Where M1 and M2 are the two masses, a is theacceleration of the masses and g is the acceleration due to gravity.
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