04-10-2020
Physics

contestada

Calculate the speed of a bike rider who accelerates (from rest) for 5 seconds down a hill at an acceleration of 8
m/s2

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04-10-2020

Answer:

speed=abs(v)=40ms^-1

Explanation:

acceleration, a = (v-u)/t

since initial velocity u=0 (at rest) and a=8ms^-2,

8=v/5

hence after 5 seconds, v=40ms^-1

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