# Power and work

## Quiz by Abed Suwissat

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9 questions

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- Q1A car exerts a force of 2000 N and moves a distance of 5 meters in the direction of the force. How much work is done by the car?10000 Joules2500 Joules5000 Joules1000 Joules30s
- Q2Which of the following statements about power is true?Power is measured in joules.Power is equal to work.Power is independent of time.Power is the rate at which work is done.30s
- Q3If a person pushes a wall with a force of 50 N but the wall does not move, how much work is done on the wall?0 Joules100 Joules10 Joules50 Joules30s
- Q4A light bulb converts 60 Joules of electrical energy into 48 Joules of light energy. What is the efficiency of the light bulb?120%20%50%80%30s
- Q5A crane lifts a 500 kg object a vertical height of 8 meters in 20 seconds. What is the average power output of the crane during this lift?1500 Watts1960 Watts2500 Watts2000 Watts30s
- Q6A runner completes a 400 meter race in 50 seconds. If the runner exerted 500 Watts of power, how much work was done?10000 Joules20000 Joules30000 Joules25000 Joules30s
- Q7A motor uses 1500 Joules of energy to move a load 25 meters. What is the force exerted by the motor?70 N60 N50 N100 N30s
- Q8A machine applies a force of 800 N to push a box horizontally for a distance of 5 meters. If the machine exerts this force for 10 seconds, what is the power output of the machine?400 Watts800 Watts1000 Watts200 Watts30s
- Q9A fan operates by using 180 Joules of energy to move air for 2 minutes. What is the average power consumption of the fan?90 Watts180 Watts1.5 Watts3 Watts30s