Question

A car is m9ving with the initial velocity 15m/s.Car stopped after 5s by application of breaks.Find the retardation (Decelaration).​

Answer 1

Answer:

acceleration=final velocity - initial velocity/time taken

a=0 - 15/5

acceleration= -3m/s^2

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Answer 2

Answer:

t= 5 s

u = 5 m/s

v = 0 m/s      

(after application of breaks)

a= ?

v= u +at

0 = 15 + (a × 5 )

a = -15/5

a = -3 m/sec²