How to calculate the power
Power can be calculated using the following formula:
Power = Work / Time
or
Power = Force x Distance / Time
Where:
Work is the amount of energy transferred when an object is moved over a distance by a force.
Time is the duration over which the work is performed.
Force is the amount of energy required to move an object over a distance.
Distance is the length of the path over which the force is applied.
For example, if a person lifts a 10 kg weight to a height of 2 meters in 5 seconds, the power can be calculated as follows:
Work = mgh = 10 x 9.8 x 2 = 196 Joules
Time = 5 seconds
Power = Work / Time = 196 / 5 = 39.2 Watts
Therefore, the power required to lift the weight is 39.2 Watts.
Calculating power can be done using the formula:
Power (P) = Work (W) / Time (t)
1. Determine the work done on an object. Work is calculated using the formula:
Work (W) = Force (F) * Distance (d) * cos(theta)
where theta is the angle between the force vector and the displacement vector.
2. Determine the time taken to do the work.
3. Substitute the values of work and time into the power formula:
Power (P) = Work (W) / Time (t)
4. Calculate the power by dividing the work by the time taken.
Note: Power is measured in watts (W), where 1 watt is equal to 1 joule per second.