Question

A car is moving on a straight road with a speed 20m/s. At t=0, the driver of the car applies brakes after watching an obstacle 150m ahead. After the application of the brakes the car retards with 2m/s^2. Find the position of the car from the obstacle at t=15s

Answer 1

Answer:

u=20m/s

a= -2m/s^2

t=15 sec

s=ut+1/2at^2

s=20×15-1/2×2×15×15

s=300-225

s=75m

So answer is 75 m from the obstacle.

Explanation:

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