IB-DP HL Physics Paper-1 Solutions(Question-5) May-2021 TZ-1 #shorts #physics #ibdp #hl #sl

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Easier way = potential energy at the start is mgh. An the end there is no mechanical energy so work done by friction is equal to potential energy. We find work by force times distance. mg times coefficent of frinction (x) is our force and times distance we get mgdx which equals potential energy mgh. For mgdx to be equal to mgh our x should be h/d

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why is change in kinetic energy negative?

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