Question

answer fast please i need please​

Answer 1

initial velocity = 90km/hour

final velocity = 0km/ hr

time = 10 second

km/ hour to m/s

90km×1000÷3600second

90000÷3600

25m/s

acceleration = final - initial velocity

= v-u/ 10

= 0 - 25 /10second

= -2.5m/s²

retardation = -2.5m/s²

2)

V = U + at

0 = U + 5m/s² ( 10)

initial velocity = 50m/s

to stop from beginning to end