Question

please do this question fast

Answer 1

v^2=u^2+2as
u=45m/s
v=0
-u^2=2as
-45^2=2as
2025=2×10×s
s=2025/20
s=101.5m
v=u+at
v=0
-u=at
t=u/a
t=45/10
=4.5s