A car moving at 70 lm/h accelerates to a speed of 110 km/h in a time of 5 secs.(adsbygoogle = window.adsbygoogle || []).push({});

a) What was the cars acceleration?

b) How far did the car travel while accelerating for the 5 secs?

My Ans for a):

V1 (initial velocity)=70 km/h or 7000 m/s

v2 (final velocity)=110 km/h or 110000 m/s

t (time)=5 secs

Find a (acceleration)

a = V2 - V1 / t2 - t1

a = 110 - 70 / 5 - 0

a = 40 / 5

a = 8 km/h or 8000 m/s

I am not even close and believe I am wrong in converting to consistent units also. Am I even using the right formula? As for ans b), I believe I need to figure out the acceleration first. When I have that, I think the formula I should be using to figure out b) is d = (V1 + V2) / 2 x t. Is this even correct?

Your help is much appreciated,

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# Homework Help: Basic Kinematics

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