The speed of a bus increases uniformly from 15 ms per second to 60 ms per second in 20 seconds. calculate 1. the average speed 2. the acceleration 3. the distance travelled during the entire period

Question

Ryker David

Physics

31 May, 12:42

The speed of a bus increases uniformly from 15 ms per second to 60 ms per second in 20 seconds. calculate 1. the average speed 2. the acceleration 3. the distance travelled during the entire period

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Castaneda · Answer 1

Vf = 60m/s

vs = 15m/s

t=20s

a = vf-vs/t

a = 45m/s / 20s

a = 2,25 m/s²

S = vs * t + 1/2 a*t²

S = 15 m/s*20s + 1/2 * 2,25m/s² * 400 s²

S = 300m + 450m

S = 750m

v average = 750m/20s

v average = 37,5 m/s