A body accelerates from rest with a uniform acceleration a for a time t . The uncertainty in a is 8 % and the uncertainty in t is 4 % . The uncertainty in the speed is

Step-by-step solution

Given, uncertainity in acceleration, a a 100=8 % Uncertainity in time, t t 100=4 % Since, body starts motion from rest, hence by the first equation of motion, aligned v &=u+a t v &=0+a t v v &= a a + t t v v 100 &= a a 100+ t t 100 &=8 %+4 %=12 % aligned