An object moving at 40 m/s takes 10 s to come to a stop. What is the object’s acceleration?

-4 m/s^2

Explanation:

v=vo+at

0=40+a(10)

-40=a(10)

-4=a

We know that,

Acceleration = Change in rate of velocity/time taken.

A = 0 - 40/10

A = - 40/10

A = - 4m/s².

Hence, Negative acceleration or Retar-dation of the object is 4m/s².

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