A car starting at u = 5 m/s accelerates uniformly at a = 2 m/s² for t = 4 s. Its final velocity v is:
A8 m/s, computed by v = at only
B9 m/s, computed by adding u and at minus 4
C2 m/s, computed without the initial velocity
D13 m/s, computed by v = u + at = 5 + (2)(4)
Answer & Solution
Correct answer: D. 13 m/s, computed by v = u + at = 5 + (2)(4)
v = u + at = 5 + (2)(4) = 5 + 8 = 13 m/s.
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