# Velocity and Smart Timer

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Cruz, Romer Kevin C. Oct. 29, 2013 2010150921 Nov. 05, 2013 PHY10L/A11 Experiment # 2 KINEMATICS Abstract - Kinematics of linear motion is defined as the studies of motion of objects without considering the effects that produce the motion. This experiment will show how to determine the linear motion with constant (uniform) velocity particularly the dynamic cart and linear motion with constant (uniform) acceleration, (e.g. free fall of motion). At the end of the experiment we found out that the velocity is a speed that involves direction of an object as well as the time. While for the acceleration, it is directly proportional to the distance or height but inversely proportional to the time. By close…show more content…
Adjust the track if the cart moves until it became stationary. We then attached the picket fence to the cart. The first photo gate was set mounting at 25 cm mark and the second at 65 cm mark to the track. We adjust the photo gates height so the picket fence attached to the cart will not touch the photo gate. We securely placed the gates to the track perpendicular to minimize errors. The phone plug of both photo gates are connected to the smart timer, photo gate 1 to channel 1 and photo gate 2 to channel 2. We then set the mode of the smart timer to measure TIME, TWO GATES. And press the third button on the smart timer to start/restart. The cart is placed at 0 cm mark on the track. The cart was launched be pressing the trigger, we take the reading on the smart timer and record this as the time interval for the first trial. The displacement is figured by subtracting the distance of the first photo gate to the second photo gate. The cart is launch 5 times more, with each launch adjusting the position of the photo gate 2 by 10 cm. Then we compute for the cart’s average speed. After the data gathering, we plot a graph with displacement against time. Part B: Determination of Acceleration Due to Gravity Using Cart’s Acceleration. We set up the track with the 0 cm end elevated using a stand, with the end stop at the lower end and record it as final position, Xf. The height, H of the track is adjusted to 10 cm as its initial height. We placed the photo