4. Motion of an object subjected to a constant force (cart and fan) If the cart

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4. Motion of an object subjected to a constant force (cart and fan) If the cart was subjected to a constant force (an attached fan propelling the cart) such that the cart starts close to the motion detector (20 centimeters in front of it) and allowed to accelerate away from the motion detector what shape would the position versus time graph have? Draw what you believe the shape of this motion would look like in the graph below. 60 50 40 E 40 30 20 10 10 15 Time (s) Now, set up the cart, the fan, and the motion detector as described above and record the position versus time motion. Draw this actual motion on the graph below. Discuss whether, or not, how well your prediction compares with the actual motion. 60 50 40 30 20 10 10 15 Time (s) Discussion:

Explanation / Answer

3.
Total mass = mass of fan unit + mass of cart
M = 0.23 + 0.5 = 0.73 kg
Force, F = 2.2 N
Acceleration, a = F/m
= 3.01 m/s2.

The distance traveled, s = ut + 1/2 at2.
u is the initial velocity, u = 0
s = 1/2 at2.

Final velocity, v = at

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