The truck of a passenger car applies brakes at a velocity of 30 m/s and comes to rest 5 seconds later. What is the deceleration?

(30 m/s)/(5s) = 30/5 = 6 m/s^2

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Let have the final velocity=30 u=0

D=v-u/t
=30-0/5
=6s

To calculate the deceleration, we can use the formula:

acceleration = (final velocity - initial velocity) / time

Given:
Initial velocity (u) = 30 m/s
Final velocity (v) = 0 m/s
Time (t) = 5 s

We can substitute these values into the formula to calculate the deceleration:

acceleration = (0 - 30) / 5
acceleration = -30 / 5
acceleration = -6 m/s²

Therefore, the deceleration of the truck is -6 m/s². The negative sign indicates that the truck is decelerating (slowing down).