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Problem 7.7 Part A A radesman sharpensa knide by pushing it against the of a grinsione The 35 ตย da-seres somrut 200 rpm and has amass of 25 kg The coeicent of knelic hetion beeen the knfe and the stone is 0 20 the store loses 10% oft speedin10 Sofgmangar.S Po bce alhwhich he man presses hin/e aganst the Stow? Express your answer to two significant figures and inchade the appropriate units Units C Retan to Provide Feedback
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Apply lewtons and la,

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