Question

Abus decreases its speed b y 80 kmph in 5s. Then acceleration

Answer 1

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acceleration = distance/ time.

Given: 80km in 5s

acceleration = 80/5 = 16

Answer 2

The acceleration will be negative( known as decceleration) since it is slowing down

a= v-u/ t

here v= 0

u= 80km/hr= 80*5/18= 22.22 m/s

t= 5s

a= 0-22.22/5

= - 4.4 m/s^2