Problem How much work and power do you put into getting up a flight of stairs? Background Information __ Work equals force times the distance through which the force acts.Force is expressed in Newtons (N) and distance is expressed in meters (m). Work is expressed in newton meters, or the simplification, joules (J). The rate at which work is done is called power. Power equals work divided by time. If work is in joules (J)and time is in seconds (s), power is expressed in joules/second, or the simplification watt (w)James Watt was a British scientist who invented the steam engine. To find out how the power of his engine compared to that of a horse, Watt measured how fast an average horse could do work.He found the answer and expressed the amount of work performed per second as a horsepower. One horsepower is the equivalent of 746 w. Pre-Lab Questions - Answer in complete sentences or no credit. 1.What is the difference between mass and weight? 2. What is work?Include the formula and units. 3.What is power?Include the formula and units. 4.What is the difference between work and power?

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Problem How much work and power do you put into getting up a flight of stairs? Background Information __ Work equals force times the distance through which the force acts.Force is expressed in Newtons (N) and distance is expressed in meters (m). Work is expressed in newton meters, or the simplification, joules (J). The rate at which work is done is called power. Power equals work divided by time. If work is in joules (J)and time is in seconds (s), power is expressed in joules/second, or the simplification watt (w)James Watt was a British scientist who invented the steam engine. To find out how the power of his engine compared to that of a horse, Watt measured how fast an average horse could do work.He found the answer and expressed the amount of work performed per second as a horsepower. One horsepower is the equivalent of 746 w. Pre-Lab Questions - Answer in complete sentences or no credit. 1.What is the difference between mass and weight? 2. What is work?Include the formula and units. 3.What is power?Include the formula and units. 4.What is the difference between work and power?

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1. Mass is the amount of matter in an object, while weight is the force of gravity acting on that mass. Mass is a scalar quantity measured in kilograms (kg), while weight is a vector quantity measured in Newtons (N).2. Work is the energy transferred to or from an object by a force acting on the object as it moves over a distance. The formula for work is W = Fd, where W represents work (measured in Joules, J), F represents force (measured in Newtons, N), and d represents distance (measured in meters, m).3. Power is the rate at which work is done. The formula for power is P = W/t, where P represents power (measured in Watts, W), W represents work (measured in Joules, J), and t represents time (measured in seconds, s).4. Work is the total energy transferred by a force acting over a distance, while power is how quickly that work is done. Work is measured in Joules, and power is measured in Watts (Joules per second). You can do the same amount of work (e.g., climb the same flight of stairs) but have different power outputs depending on how quickly you do it.

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