Question

How far does a car travel in 30.0 s while its velocity is changing from 50.0 km/h to 80.0 km/h at a uniform rate of acceleration?

Answer 1

Answer:

v = u + a t

80 = 50 + a * 30

80 - 50 /30 = a

a = 30/30 = 1 m /s 2

s = u t + 1/2 at ^2

s = 50 * 30 + 1/2 * 1 * 30^2

s = 1500 + 1/2 * 900

s = 1500 + 450

s = 1950 m