A car is traveling 20m/s brakes and takes 3 s to stop.What is the acceleration in m/s
-(20/3) m/s^2
vf=vi+at
0=20m/s + 3sec*a
solve for a in m/s^2
To calculate acceleration, we need to use the formula:
acceleration = (final velocity - initial velocity) / time
In this case, the initial velocity is 20 m/s, the final velocity is 0 m/s (since the car stops), and the time is 3 seconds.
Plugging these values into the formula, we get:
acceleration = (0 m/s - 20 m/s) / 3 s
Simplifying, we have:
acceleration = -20 m/s / 3 s
Dividing -20 m/s by 3 s, we find:
acceleration ≈ -6.67 m/s
Therefore, the acceleration of the car is approximately -6.67 m/s². The negative sign indicates that the car is decelerating or slowing down.