Posted by **nicky** on Wednesday, September 19, 2012 at 1:11pm.

find the acceleration if the velocity changes from:

a) 2m/s to 4m/s in 4s

b) 5m/s to 10m/s in 2s

c) 100m/s to 120m/s in 5s

d) 86m/s to 94m/s in 4s

e) 21m/s to 35m/s in 18s

thank you!

- phyics -
**Steve**, Wednesday, September 19, 2012 at 1:25pm
acceleration is (change in velocity)/(time used)

That is, keeping track of the units,

acceleration(m/s^2) = velocity(m/s) / time(s)

a) (4-2)m/s / 4s = 2m/s / 4s = 1/2 m/s^2

Do the others in like wise. Come on back if you get stuck, or just want confirmation of your answers.

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