Question

please answer this question​

Answer 1

Initial Velocity of the Car (u) = 100 m/s

As, the car will be brought to rest, So

Final Velocity of the Car (v) = 0

Time Taken = 20s

Using

$v = u + at$

$0 = 100 + 20a \\ - 100 = 20a \\ a = - 5m{s}^{ - 2}$

As the Car Retarded, so the Acceleration will be Negative.

Hope It Helps.

Mark Brainliest.