Power is the rate at which work is done, and it is measured in watts (W). It can be calculated using the formula:
Power = Work / Time
Work can be calculated using the formula:
Work = Force x Distance x cos(theta)
where Force is measured in Newtons, Distance is measured in meters and theta is the angle between the force and displacement vectors.
As we are not giving any value for the angle between force and displacement vectors, we can assume it's zero degree, so the cos(0)=1
So we can plug in the given values to find the work done:
Work = 35 N x 20 m x 1 = 700 J
Now we can calculate power:
Power = 700 J / 5 s = 140 W
Therefore, the power of the bus is 140 Watts