The Power of Work

Unlock the power of physics! Master work and power calculations with our easy-to-follow guide and practice problems.

Use 4.1 Power Point Based on yesterday's Edpuzzle complete the blanks below. Work is a measure of how much energy is transferred.The reason why is because work involves aforceand distance moving in the samedirection.The Unit for forceis Newton.The Unit for distanceis meters.Together they make the Joulepronounced like Jewel, which is the unit for work and energyThe equationfor work is W=F*dPower is the rate of work completed. It is how long it takes to do a given amount of work.The unit for power is the Watt.The equation for power is P=W P is power, W is work, and t is time.The unit for time is seconds. Work or not Work? In order for work to be done in terms of science, the direction of the force and the direction of motion must be the same. In the 1st example, the girl is pushing to the right and the box is moving right, those are both in the same direction so it is work. In the second example holding the backpack up means the force is going up and she is moving forward. The direction of the force and the direction of motion are not the same, so this is not considered work. What about the last 2 examples? Yes No Manuel is carrying a 10lb bag of fertilizer a distance of 5 meters to the table. Is Manuel doing work? yes no I do not know A weightlifter pulls 100 lbs of weight above his head and holds them there for 1 minute. Is the weightlifter doing work? yes no I do not know Tammy is pushing her 3-ton car with a force of 25 Newtons a distance of 10 meters. What is the amount of work being done? (Work = force x distance and they must be going in the same direction)) 7,500 J 30 J 250 J Match the following to the correct description The unit for power is watt The unit for work is joules Work divided by time equals power Force times distance equals work The further you carry an object the more work that is done. true false When you exert a force on an object that causes the object to move some distance what has occurred? power work force The further you push an object in the same direction of the force, the more work you do. true false the athlete does no work on either the 200 N weights or the 400 weights the athlete does no work on the 200 N weights but does work on the 400 N weights the athlete does work on both the 200 N weights and the 400 N weights the athlete does work on the 200 N weights but does no work on the 400 weights