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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Physics

Jeffery Galvan

31 March, 03:03

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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Bowers · 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