A car is brought to rest after applying treaks from a speed of 45m/s in 5sec. What would be the acceleration of the car? What does the sign (positive or negetive) of the acceleration, indicate
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Answer: acceleration= -9 m/s^2.
Explanation:
a=(V-U)÷t
=(0-45)÷5
= -9 m/s^2.
AND NEGATIVE SIGN MEANS THAT THE SPEED IS DECREASING THUS NEGATIVE SIGN INDICATES HERE BRAKING OF CAR AND NOT INCREASING THE SPEED OF CAR.
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