Question

7. A Car speed reduces its speed from 40km/hr to 10km/hr in 5 seconds, then
its accelaration is
A) -6m/s B) 6m/s2 C) 10m/s2 D) -10m/s2
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Answer 1

Heya!

Acceleration of car =

Change in Speed

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Time taken to change that speed

Acceleration of car = (10 - 40 )/5

Acceleration of car = -30/5

Acceleration of car = -6km/hr