A car is moving at a constant speed 30 m/sec. at a distance of 100 m there is a obstacle immediately brakes are applied which give constant retardation 6 m/s.what is the distance from the wall after 12 s.?
1 Answer
Dec 25, 2014
We have to bring our speed back to 0.
With a retardation of
In these 5 seconds we go from a speed of 30 m/s to 0 m/s.
During these 5 seconds we can say that our average speed was:
Since distance=average speed x time, we come up with:
Answer:
The car stops 25 meter from the wall after 5 seconds.
Extra
To answer the complete question: If the driver does not decide to move his vehicle, it will still be 25 m from the wall after 12 s.
