In class today, we used the ticker timer to find the average velocity of the buggy. The velocity of the buggy is uniform. The ticker timer makes 60 dots per second. We used the ticker timer and a ruler to find the the time and distance between the dots. In order to find the average velocity, you must divide the distance by the time (change in x by the change in t). The average velocity was 0.7 cm / 0.016 s = 43 cm/s. 43 cm/s * 10 s = 4.3 m. Velocity = 43 cm/s and change in time = 20 seconds round-trip. How far did the buggy travel in total? (v * change in time) = 43 * 20 = 860 cm. We also discovered that distance = (change in time / 2) * velocity or
distance = (velocity * change in time) / 2.
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1 comments:
good post. Just a quick couple of notes:
1. The formula at the end is only useful when you have something moving at a constant velocity that bounces off an object and returns (like a sound wave) and it can then be used to find the distance to the object.
Anyone want to try to take a stab at telling us what the big ideas from yesterday were?
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