a table is pushing 15m across a room with the force of 15 and if that it takes 20 seconds to push that across the room what is the power
Answers
Explanation:
What is Power?
Energy is a measure of how much work can be done without any consideration of how long it takes to accomplish the work. Power is the measure of how quickly the work is done so it is a time-dependent function. Thus, two marathon runners do the same amount of work when they run the 26 miles, 385 yards or 42 kilometers. However, the runner that finishes the marathon in 2 hours 30 minutes runs twice as powerfully as the runner that finishes in 5 hours. Power is the amount of energy used per unit of time. The difference between energy and power is that power may be measured at any point in time, while energy has to be measured during a certain time period such as a second or an hour.
Power = Work/Time = (Force x Distance)/time
Units of Power
The unit of power is joules per second or J/s when work is measured in joules and time in seconds. The basic unit of power, 1 J/s is called a watt (W), named after James Watt who made important improvements to the steam engine. By definition, a watt is the consumption of one joule of energy per second.
1 W = 1 J/s.