Acar braked with a constant deceleration of 4 ft/s2, producing skid marks measuring 200 ft before coming to a stop. how fast was the car traveling when the brakes were first applied? ft/s

40 ft/s

Explanation:

We can solve the problem by using the following SUVAT equation:

where

v = 0 is the final speed of the car

u = ? is the initial speed of the car

a = -4 ft/s^2 is the acceleration of the car (with a negative sign, since it is a deceleration)

d = 200 ft is the distance covered by the car

Substituting and re-arranging the equation, we find

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