A horizontal spring with spring constant 100N/m is compressed 20cm and used to launch a 2.3kg box across a frictionless, horizontal surface. After the box travels some distance, the surface becomes rough. The coefficient of kinetic friction of the box on the surface is 0.15.Use work and energy to find how far the box slides across the rough surface before stopping.

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Determine the maximum r-value of the polar equation r =3+3 cos 0

Aperson standing in a canoe exerts a force of 700 n to throw an anchor over the side. find the acceleration of the canoe if the total mass of the canoe and the person is 100 kg?