a bus starts from rest and achieves a velocity of 20m/s in 10s while moving westwards.calculate its avarage acceleration
velocity changed by 20m/s in 10s. So that means an average acceleration of
(20m/s)/(10s) = (20/10) m/s^2 = 2 m/s^2
That is, every second, the velocity increased by 2 m/s, thus going from 0 to 20 in 10 seconds.
To calculate the average acceleration, we can use the formula:
Average acceleration (a) = (Final velocity - Initial velocity) / Time
In this case, the initial velocity is 0 m/s because the bus starts from rest. The final velocity is 20 m/s, and the time taken is 10 seconds.
So, plugging in the values into the formula:
a = (20 m/s - 0 m/s) / 10 s
Simplifying:
a = 20 m/s / 10 s
a = 2 m/s²
Therefore, the average acceleration of the bus is 2 m/s² (meters per second squared).