Lab: Motion with Constant Acceleration Answers

In the lab, you looked at speed-time graphs to determine the acceleration of the cart for each of the three fan speeds.

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ABC

LowMediumHigh

ABC

LowMediumHigh

⇒ 54.0

⇒ 67.6

⇒ 18.0

ABC

The simulation kept track of the time and automatically recorded data on cart displacement and velocity. If the cart trials were run with a real cart and fan using meter sticks and stopwatches, how might the data compare? Check all that apply.There would be variables that would be hard to control, leading to less reliable data.The data would be just as valid if it were recorded with a stopwatch.Meter sticks may lack precision or may be read incorrectly.Real fans will always perform exactly the same as virtual fans.Human error in recording or plotting the data could be a factor.

✔ fan speedmassacceleration

⇒ 54.0

Calculate the average velocity of the cart for each fan speed. Round your answers to the nearest tenth. The cart with Low fan speed has an average velocity of ⇒ 67.6 cm/s. The cart with Medium fan speed has an average velocity of cm/s. The cart with High fan speed has an average velocity of cm/s.

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In the lab, you looked at speed-time graphs to determine the acceleration of the cart for each of the three fan speeds. What was the acceleration of the cart with Low fan speed? ⇒ 18.0 cm/s2 What was the acceleration of the cart with Medium fan speed? cm/s2 What was the acceleration of the cart with High fan speed? cm/s2

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In the lab, you performed a trial where the fan was turned off partway through the run. What did the graph for this trial look like? How does the slope of the graph change, and why?