I\'ve tried .30 * .34J = .102J and that didn\'t work either. Help finding the st

Question

I've tried .30 * .34J = .102J and that didn't work either. Help finding the standard deviation in the kinetic energy would be greatly appreciated! Thanks!

The speed y of a 1.10 kg cart is measured after it rolls 1.00 m down an inclined track. Five readings are taken and the average and standard deviation of the speed is computed. The results are = 0.79 m/s and sigma v = 0.12 m/s. Calculate the fractional standard deviation in the speed. Ev = .15 Calculate the kinetic energy of the cart at the end of the trip. K= .34 J Calculate the fractional standard deviation in the kinetic energy. EK = 30 . . Calculate the standard deviation in the kinetic energy. Sigma k = .60 J Record the value of the kinetic energy using the form KJK (units) with correct significant figures. K = 0.34 + or - .32 j

Explanation / Answer

sigmaK = mv * sigmav

sigmaK = 1.10 * 0.79 * 0.12

singmaK = 0.10428

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