Answer:
time taken= 8s
deceleration = -0.625ms^-2
Step-by-step explanation:
s = 1/2(u+v)t (linear motion formula)
20 = 1/2 ( 5+0 ) t
t=time taken, find t
t= 8s
a= (v-u) / t
a= (0-5) / 8s
= -0.625 ms^-2
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