Question

explain the correct answer

Answer 1

#(36.)
u=0
a=1.8m/s^2
S=10m

v^2=u^2-2as
v^2= 0-2×1.8×10
v^2=-16
v=-4 m/s

#(37.) speed at 10 m(v1)= -4m/s
speed at 20m(v2) = 0
Distance is directly proportional to the square of speed=>
s= u^2
option d is correct.

#(38.)
u= -4m/s
v^2 = (-4)^2-2×1.8×10
v^2= 16-16 =0