Deceleration

In a braking test, a vehicle that travels at 51 km/h stops in 5 s. What is its acceleration?

Correct answer:

a =  -2.8333 m/s2

Step-by-step explanation:

v1=51 km/h m/s=51:3.6  m/s=14.16667 m/s v2=0 m/s t=5 s  a=ΔtΔv  a=tv2v1=5014.1667=617 m/s2=2.8333 m/s2



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