Answer:
C. 12.4 m/s
Explanation:
Acceleration (a) = -6.2 m/s²
Final velocity (v) = 0 m/s (Comes to rest)
Time taken (t) = 2.0 s
By using equation of motion, we get:
[tex] \bf \longrightarrow v = u + at \\ \\ \rm \longrightarrow 0 = u + ( - 6.2)(2.0) \\ \\ \rm \longrightarrow 0 = u - 12.4 \\ \\ \rm \longrightarrow u - 12.4 = 0 \\ \\ \rm \longrightarrow u + 12.4 - 12.4 = 0 + 12.4 \\ \\ \rm \longrightarrow u = 12.4 \: m {s}^{ - 1} [/tex]
[tex] \therefore [/tex] Initial velocity (u) = 12.4 m/s
