A block with mass m = 2.5 kg slides head-on to a spring with spring constant k = 320 N/m . When the block stops, the spring has been compressed by 25.0 cm . The coefficient of kinetic friction between the block and floor is 0.21. While the block is in contact with the spring and being brought to rest, A. what is the work done by the spring force and friction? B.What is the block’s speed just as it reaches the spring?

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Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.