(Solved): A 25 kg box sliding to the left across a horizontal surface is brought to a halt at a distance of ...

A 25 kg box sliding to the left across a horizontal surface is brought to a halt at a distance of 45 cm by a horizontal rope pulling to the right with 15 N tension. What was the initial speed of the crate before the tension was applied?

A $$25\mathrm{kg}$$ box sliding to the left across a horizontal surface is brought to a halt in a distance of $$45\mathrm{cm}$$ by a horizontal rope pulling to the right with $$15\mathrm{N}$$ tension. Part B How much work is done by gravity? Express your answer with the appropriate units. Part C What was the initial speed of the crate before the tension was applied? Express your answer with the appropriate units.