A freight company uses a compressed spring to shoot 1.60 kg packages up a 1.00-m -high frictionless ramp into a truck, as the figure(Figure 1) shows. The spring constant is 367 N/m and the spring is compressed 31.0 cm Figure 10m. 50-cm-long sticky spot 1 of 1

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Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.