A golf ball has a mass of 40g, and a speed of 45 m/s. If the speed can be measured within accuracy of 2%, calculate the uncertainty in the position. This is not my question really here, But my question (doubt) is why we choose the uncertainty of velocity be 2% of given velocity 45 m/s, I mean we know from the question that "speed can be measured within ACCURACY of 2%, then there should be 98% of error/uncertainty in the measured speed, isn't it? Maybe there is some figure of speech in the question that i have missed about accuracy statement? I want confirmation.
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If the speed can be measured within accuracy of 2%, calculate the uncertainity in the position. The uncertainty in the speed is 2%, i.e., 45 × 2/100=0.9ms -1 .....
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