Schematization Draw a diagram of the object that interests us. Draw your x and y axes. Draw and name each force experienced by the object that interests us. Modelization Create a model for the tension force modulus that will be used to pull the sled based on the available parameters that are relevant (they may not all be!). Then test your model with the following values: Mass of your cousin: 30 kg Walking speed: 1.6 m/s Coefficient of static friction: 0.66 Kinetic coefficient of friction: 0.35 Angle of the chord with the horizontal: 43 degrees
Pull the sled
Context
It's a wonderful winter's day, you bring your little cousin sledding! To get to the mountain, you have to pull your little cousin in the sled on the snowy sidewalk (a horizontal surface). It's still a good exercise for the arms, you wonder how much force you need to provide to pull the sled rope.
Information
You know your cousin's mass.
You walk at a constant and known speed on the sidewalk.
You know the static and kinetic coefficients of friction of the sled on the snow.
You know the angle between the string you are pulling and the horizontal.
Schematization
Draw a diagram of the object that interests us. Draw your x and y axes. Draw and name each force experienced by the object that interests us.
Modelization
Create a model for the tension force modulus that will be used to pull the sled based on the available parameters that are relevant (they may not all be!).
Then test your model with the following values:
Mass of your cousin: 30 kg
Walking speed: 1.6 m/s
Coefficient of static friction: 0.66
Kinetic coefficient of friction: 0.35
Angle of the chord with the horizontal: 43 degrees
Step by step
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