You need to solve each of these problems. Which expression will you use to get the correct answer? 1: A car travelling at 20 m/s puts on its brakes and decelerates by 5 m/s² for 3 s. What distance did it move in this time? ____ 2: A jet plane reached a speed of 300 m/s after accelerating at 15 m/s² using its afterburners for 2.7 seconds. How far did it go in this time? ____ 3: It takes a car ten seconds to speed up from 20 m/s to 30 m/s. How far did it move in this time? ____Matching
A
ut + ½at²
B
(v² - u²)/2 x
C
vt - ½at²
D
½ (u +v) t
E
u² + ½at²
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