Acceleration and Deceleration Experiment problem

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SUMMARY

The discussion centers on an experiment measuring the acceleration of a cart on a ramp, yielding two different acceleration values: 0.4768 m/s² and 0.4203 m/s². The discrepancy arises from the initial velocities during acceleration and deceleration phases, as well as the consistent frictional force acting in opposite directions. The gravitational component remains constant, influencing the overall acceleration experienced by the cart. Understanding these forces is crucial for accurate interpretation of the results.

PREREQUISITES
  • Basic understanding of kinematics and acceleration
  • Familiarity with Newton's laws of motion
  • Knowledge of frictional forces and their effects
  • Ability to analyze velocity-time graphs
NEXT STEPS
  • Study the effects of friction on motion in physics experiments
  • Learn about the role of gravitational force in inclined plane dynamics
  • Explore kinematic equations for varying acceleration scenarios
  • Investigate the impact of initial velocity on acceleration measurements
USEFUL FOR

Students in physics, educators teaching mechanics, and anyone conducting experiments involving motion and forces will benefit from this discussion.

realslow
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Homework Statement


I did an experiment in which we gathered velocity-time data for a cart slowing down and speeding up on a ramp. The two acceleration values I calculated from the data were 0.4768m/s^2 and 0.4203m/s^2. Why are the values different (remember that there isn't any applied force in either direction)?


Homework Equations





The Attempt at a Solution


Well... I was thinking that the initial velocity, right after the cart was pushed upwards towards the sensor, is higher than the initial velocity (0 m/s) when the car stopped and moved back down (away from the sensor). But then again, I'm not sure as to whether it would affect the acceleration values.
I was debating whether or not friction had an effect, but I can't think of why the friction would be different for the deceleration and acceleration of the cart..
I think I'm having trouble understanding the forces acting on the cart...
I would very much appreciate some help, thank you!
 
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Hi realslow, welcome to PF.
I can't think of why the friction would be different for the deceleration and acceleration of the cart..
The frictional force is the same. But it acts in the opposite direction while going up and down. But the component of g is always in the downward direction.
 
Thank you very much!
I'm a happy student now hehe :)
 

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