Question

urgent... kindly help...
Ans for 1st ques is (2)240m
Ans for 2nd ques is (1) 2s,3s

Answer 1

use v^2 - u^2 = 2as...calculate a

10^2-30^2 = 2*a*240 => a = - 800/480 = -1.667 m/sec2

Now if you increase a by 12.5%, it'll be -800*1.125/480 = -1.875 m/sec2

reuse above eq to solve for 'S' ...given V=0, u = 30 and a from above is -1.875
S = (0 - 30^2) / 2*(-1.875) = 900/3.75 = 240


for Q2.. use s = ut-1/2at^2 (calculate for t) where s=12, a = -4, u = 10

Answer 2

Hope u like my process
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