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A 2kg object is moving at 3 m/s. A 4 N force is applied in the...

A 2kg object is moving at 3 m/s. A 4 N force is applied in the direction of motion and then removed after the object has traveled an additional 5 m/s. What is initial kinetic energy of the object. What is the final kinetic energy? What is the final speed of the object?
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Answer #1

I believe there is typo: The problem probably states after the object has traveled an additional 5 m and not 5 m/s

Initial speed is u = 3 m/s

Initial kinetic energy is

The acceleration is a = F/m = 4/2 = 2 m/s2

Distance traveled is d = 5 m

The final speed is

The final kinetic energy is

Final speed is

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