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# The Factors Affecting Cart Acceleration

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## Ziling Ding

on 22 April 2014

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#### Transcript of The Factors Affecting Cart Acceleration

According to Newtons' Second Law...
Experiment 1: Friction
Experiment 1: Friction
Experiment 1: Friction
The Factors Affecting Cart Acceleration
1. How different surfaces on the track would affect the acceleration of cart when we make mass of cart and angle of track constant.
Variable: Friction

2.
Variable: Angle
The Factors Affecting Cart Acceleration
Equipments
Cart
Track
Motion Sensor
Computer
Stand
Experiment 1: Friction
Materials
(smoother than felt 2)
Felt 1
(rougher than felt 1)
Felt2
(smoother than Sport T-shirt)
Sport T-shirt
(rougher than man made- silk)
Cotton
(the roughest material)
Track
(the most smoothest surface)
Result
When mass of cart and angle of track are constant, the friction affects acceleration of cart, the smoother of surface, the bigger acceleration of cart; the rougher of surface, the smaller acceleration of cart.
Experiment 2: Angle
Equipments
Stand
Track
Cart
Computer
Motion sensor
Experiment 2: Angle
Experiment 2: Angle
Result
According to our experiment and calculation. When mass of cart and friction of track are constant, the larger angle of track, the bigger acceleration of cart; the smaller angle of track, the smaller acceleration of cart.
Experiment 1: Prediction
The smoother of the surface, the bigger acceleration of cart; the rougher of the surface, the smaller acceleration of cart.
Experiment 2: Prediction
The angle of track will affect acceleration of cart ,the larger angle of track, the bigger acceleration of cart; the smaller angle of track, the smaller acceleration of cart.
References
http://en.wikipedia.org/wiki/Friction
http://en.wikipedia.org/wiki/Newton's_laws_of_motion
http://www.waveequation.com/surfwax_friction_data.html
http://www.brown.edu/Departments/Engineering/Courses/En3/Notes/Statics/friction/friction.htm
F=ma=mg sinθ
a=g sinθ

Hypotheses:
Ziling Ding (Celine)
Rongfang Xu (Freya)

What kind of acceleration will be if we change the angle of track and make mass of cart and friction of track constant.
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