PHY114Fall2020VL02UniformMotion.pdf - VL2 LAB WORK UNIFORM...

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PHY 114 LAB WORK 2 | 1 LAB WORK VL2 UNIFORM MOTION Objective: To determine if a system experiences uniform motion. To determine the velocity with which a car travels along a frictionless track. Introduction: Movement of an object can be seen as a change in its position over some period of time. We will be examining one particular type of motion; uniform motion. Velocity can be defined as the rate of change in the distance an object travels, in a particular direction, per unit time, such as miles per hour, feet per second, meters per second, or centimeters per second. An object traveling with uniform motion maintains the same velocity for the entire time it is observed. Where d is the distance, t is the time and v is the velocity, this relationship can be expressed as: 𝑣 = 𝑑 𝑡 When this experiment is performed in the laboratory premises, the apparatus we use is a linear air track. The air track has a triangular surface with many small holes and air is pumped through these holes. The air forms a cushion between the track and gliders which "float" on this cushion. This allows the examination of the movement of these gliders with almost no friction. The lack of friction is important as it allows the gliders to move with relatively constant velocity over large distances. Another key factor is to ensure that the track is properly leveled so that no acceleration is experienced along the track. Otherwise, if acceleration is a factor anywhere along the track then velocity will no longer be constant. Pre-lab exercise: To get acquainted with motion and corresponding graphs use the links below: - man/latest/moving-man.html?simulation=moving- man 261PHY206MovingManSimulation.doc?dl=0 Tutorial video: Fig. 2. Moving man simulation. Fig. 1. Linear airtrack
UNIFORM MOTION LAB WORK 2 | 2 PHY 114 Experiment procedure: For this experiment we will be using the simulation below where you will see a frictionless track a car and timers to record the elapsed time. Click on the link below to access the simulation: By default the simulation is set to a distance of 25 m but we will be sliding the timers to change the distance between them and run the experiment for various distances, obtain the time and determine if the velocity is constant. Part I Determining the velocity of a moving car: 1. The first thing we must do is to make sure there is no acceleration in the system, therefore the Acceleration cell must be set to 0.0 m/s 2 , simply enter 0.0. The initial position remains at 0.00 m.

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