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Given:

Initial Velocity : 30 km/hr

Final Velocity : 88 km/hr

Time : 7 seconds

Acceleration: ?

Distance: ?

correct me if i'm wrong

First I need to get the acceleration and convert my Vf and Vi to seconds. a = Vf - Vi / T

88km/hr - 30km/hr = 58 km/hr divide by 3600 so it will be in seconds so 0.016111111s / 7s = A

now that I have my acceleration (0.002301587286 km/s) I can either use this formula 2ad = Vf^2 - Vi^2 or D = Vi * T + 1/2 at^2

sooo...

(88 km/hr)^2 - (30 km/hr)^2 / 2(0.002301587286km/s) = Distance

so convert Vf^2 and Vi^2 to seconds again then divide by 2(0.002301587286km/s) to get distance

other solution :D

(30 km/hr) (7s) + (0.001150793643km/s) (7s)^2 = D

in this equation do I have to convert 30 km/hr to sec? If 2 of my equation are right both should have the same answer but both are different :(

Now my question is are all my equation/solution right? If not please correct it. :)