Keiko is riding a skateboard 2 m/s, west. How long will it take her to reach a velocity of 8 m/s, west if her acceleration is 2 m/s2

Question

Jacklyn

Physics

17 July, 19:11

Keiko is riding a skateboard 2 m/s, west. How long will it take her to reach a velocity of 8 m/s, west if her acceleration is 2 m/s2

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Answers (2)

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Kendall Maddox · Answer 1

Your initial velocity is 2 m/s. lets call that 'U' and your final velocity is 8 m/s. Lets call that 'V'.

a = (V-U) / t

but we are asked 't' not 'a' so the formula changes to ...

t = (V-U) / a

t = (8-2) / 2

t = 3 sec

Mccann · Answer 2

Due to the fact that, we are not given a specific displacement (distance)

I have to assume we need to use the two accelerations

Therefore 8m. s/2m. s = 4m. s