Question

give me answer fast​

Answer 1

Answer:

0.5 m/s^2

Explanation:

u = 72km/h = 72 × 5/18 = 20m/s

v = 54km/h = 54 × 5/18 = 15m/s

a = v-u

t

a = 15-20

10

a = -5/10

a = -1/2

a = -0.5

Now retardation will be -(-0.5) = 0.5 m/s^2

Answer 2

a is negative since retarding