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gizmo_the_mogwai [7]
3 years ago
11

An object is accelerating at -6.2 m/s? It comes to a stop after 2.0 seconds. What was its initial velocity?

Physics
1 answer:
Vsevolod [243]3 years ago
5 0

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:

\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}

\therefore Initial velocity (u) = 12.4 m/s

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