camlobo07 camlobo07
  • 13-10-2020
  • Physics
contestada

a cyclist accelerates at a rate of 7m/s2. How long will it take the cyclist to reach a speed of 21m/s, if they start from rest

Respuesta :

mata84
mata84 mata84
  • 17-10-2020

Answer:

t=3s

Explanation:

v=21m/s

u=0m/s

a=7ms²

t=?

v=u+at

21=0+7

21-0=7t

t=21-0/7

t=3s

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