As shown in the figure, a 4.0-kg block is moving at 5.0 m/s along a horizontal frictionless surface toward an ideal spring that is attached to a wall. After the block collides with the spring, the spring is compressed a maximum distance of 0.68 m. 4.0 kg 5.0 m/s What is the maximum potential energy contained in the spring? What is the spring constant, k, associated with this spring? What is the speed of the block when the spring is compressed to only one-half of the maximum distance? J N/m m/s

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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.