What is power in physics?
Q: What is power in physics?
A: In physics, power is how fast work is done or energy is given from one thing to another.
Q: How is power measured?
A: Power is measured in watts (symbol: W) in the SI system of measurement.
Q: What happens when a heavy weight is lifted quickly compared to slowly?
A: The same amount of work will have been performed, but a quick lift requires more power, meaning the work can be done in a shorter time if there is more power available.
Q: How can we calculate power?
A: Power can be calculated as the rate of change of work done or the energy of a subsystem by using the equation P = W/t where P is power, W is work and t is time.
Q: Is there another way to calculate power?
A: Yes, it can also be calculated as force times velocity (or speed).
