A horizontal spring with spring constant 210 N/m is compressed by 10 cm and then used to launch a 250 g box across the floor

kinetic-friction

#1

A horizontal spring with spring constant 210 N/m is compressed by 10 cm and then used to launch a 250 g box across the floor. The coefficient of kinetic friction between the box and the floor is 0.23. What is the box’s launch speed?

Answer:

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