an object moving with the speed of 40km/h it stop after 30 mint. find the acceleration of object
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The acceleration (a) = (v-u)/t
v = final velocity = 0km/h
u = primary velocity = 40km/h
t = time = 30 minutes = 1/2 h
a = (0-40)÷1/2
a = -40 × 2
a = -80km/s²
The acceleration of the object is -80km/s² or the retardation is 80km/s².
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