The speed v of a 1.65 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 v = 0.40 m/s and sv = 0.12 m/s.
Calculate the fractional standard deviation in the speed.
ev = 0.3
Calculate the kinetic energy of the cart at the end of the trip.
K = 0.13
Calculate the fractional standard deviation in the kinetic energy.
eK = _________
Calculate the standard deviation in the kinetic energy.
sK = _________
Record the value of the kinetic energy using the form K±sK (units) with correct significant figures .
K = _____________
Part a and b are simple, but I couldn't get what is wrong with the equation I used on c and d. The web is not accepting my answer.