Question

If a car is running at a speed of 72 kilometre per hour and stops after 45 seconds then what will be the retardation

Answer 1

Answer:

72 KM/HR=20 M/HR SPEED (INITIAL  VELOCITY U )

45 S TIME (T)

0 M/S = FINAL VELOCITY V

Step-by-step explanation:

USING V=U+AT

0= 20+ AX45

-20= AX45

-20/45=A

-0.44

THEREFORE RETARDATION OF 0.44

Answer 2

Answer:

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Step-by-step explanation:

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