Part A: Explain why we do not measure the speed at which a car travels in cm per second? In your explanation, use reasoning based on appropriate units to model this situation. (5 points)
Part B: What are the two quantities that should be measured to find the speed at which a car travels? Explain how the rate can be determined.

Question

Part A: Explain why we do not measure the speed at which a car travels in cm per second? In your explanation, use reasoning based on appropriate units to model this situation. (5 points)
Part B: What are the two quantities that should be measured to find the speed at which a car travels? Explain how the rate can be determined.

anonymous · Answer

A) It's a matter of using the correct, and most meaningful units. You wouldn't want to measure the ocean in milliliters or the distance to the sun in millimeters. You can do it, but the numbers will be much larger.
B) speed = distance/time in the simplest form. So what are you measuring? A distance and a time. Or a change in distance during a particular time interval.