# Calculating Power and Work Done in Weightlifting

## How much power was used to lift the 1250N barbell 2m in 3s?

## Understanding Power and Work Done in Weightlifting

**Work Done Calculation:**

Work done is a measure of the energy required to move an object over a certain distance against an applied force. In the case of weightlifting, the work done is calculated by multiplying the force applied (in this case, the weight of the barbell) by the distance moved in the direction of the force.

In the given scenario, the weightlifter lifts a 1250N barbell for a distance of 2m in the direction of the force. Therefore, the work done can be calculated as follows:

Work Done = Force x Distance

Work Done = 1250N x 2m = 2500J

## Understanding Power in Weightlifting:

**Power Calculation:**

Power is the rate at which work is done, or the amount of work done per unit time. It is a measure of how quickly energy is transferred or converted. In the context of weightlifting, the power used can be calculated by dividing the work done by the time taken to do the work.

The formula to calculate power is:

Power = Work Done / Time

Given that the work done is 2500J and the time taken is 3 seconds, the power used to lift the 1250N barbell 2m in 3 seconds is:

Power = 2500J / 3s = 833W (rounded to 3 significant figures)

This means that the weightlifter used 833 watts of power to lift the barbell in the given time frame.