Cart on a Ramp INTRODUCTION This experiment uses a ramp and a low-friction cart. If you give the cart a gentle push up the ramp. the cart will roll upward, slow and stop, and then roll back down, speeding up. A graph of its velocity vs time would show these changes. Is there a mathematical pattern to the changes in velocity? What is the accompanying pattern to the position vs. time graph? What would the acceleration vs. time graph look like? Is the acceleration constant? In this experiment, you will use a Motion Detector to collect position, velocity, and acceleration data for a cart rolling up and down a ramp. Analysis of the graphs of this motion will answer these questions OBJECTIVES In this experiment, you will . Collect position, velocity, and time data as a cart rolls up and down an inclined track. • Analyze the position vs. time and velocity vs time graphs. • Determine the best fit equations for the position vs. time and velocity vs. time graphs. • Use analysis of motion data to define instantaneous velocity and acceleration, • Relate the parameters in the best-fit equations for position vs. time and velocity vs. time graphs to their physical counterparts in the system. MATERIALS computer Vernier computer interface Logger Pro Vernier Motion Detector incline with dynamics cart blocks to elevate track end stop Physics with Vernier Lab – 1 PROCEDURE 1. Connect the Vernier Motion Detector to the DIG/SONIC 1 channel of the interface. If the Motion Detector has a switch, set it to Track. 2. Place the Motion Detector at the bottom of the incline. Use one or two blocks to set the angle of the incline between 5° and 10. Adjust the head of the detector so that it is pointing straight up the track, or angled up just a little. 3. Open the file “03 Cart on a Ramp” from the Physics with Vernier folder. 4. Practice launching the cart with your finger so that it slows to a stop at least 50 cm from its initial position before it returns to the initial position. 5. Hold the car steady with your finger at least 20 cm from the motion detector then zero the motion detector. If your cart has a plunger, face the plunger away from the Motion Detector. Click Collect to begin data collection. You will notice a clicking sound from the Motion Detector. Wait about a second, then briefly push the cart up the ramp, letting it roll freely up nearly to the top, and then back down. Catch the cart as it nears the end stop. 5. Examine the position vs. time graph. Repeat Step 5 if your position vs. time graph does not show an area of smoothly changing position. Check with your instructor if you are not sure whether you need to repeat data collection. Identify Safety Precautions: Identify Potential Sources of Error: List Quantities to be Measured: List Graphs to be Plotted:
Comments are closed.