Answer:
The object's acceleration is 3 m/s².
Explanation:
Given that,
Speed = 9 m/s
Time = 3 sec
We need to calculate the acceleration
Using equation of motion
\(v = u+at\)
Where, v = final speed
u = initial speed
t = time
a = acceleration
Put the value into the formula
\(0 = 9+a\times3\)
\(a = -\dfrac{9}{3}\)
\(a =-3\ m/s^2\)
Negative sign shows the deceleration.
Hence, The object's acceleration is 3 m/s².
