In science class, Pilar measured the distance a toy car traveled after rolling down a small ramp. She also measured the time it tool for the car to stop. When she used her data to calculate the speed of the toy car, the speed was in units of meters per second. Why would the speed not be measured in km per hur, as it would be for a real car?
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Alison wants to use part of her hand as a measuring device. Why would the width of her pinky finger give an approximate length in cenimeters but could not be used as a accurate measurment?
