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Power and work

Quiz by Abed Suwissat

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9 questions
Show answers
  • Q1
    A 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 Joules
    2500 Joules
    5000 Joules
    1000 Joules
    30s
  • Q2
    Which 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
  • Q3
    If 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 Joules
    100 Joules
    10 Joules
    50 Joules
    30s
  • Q4
    A 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
  • Q5
    A 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 Watts
    1960 Watts
    2500 Watts
    2000 Watts
    30s
  • Q6
    A runner completes a 400 meter race in 50 seconds. If the runner exerted 500 Watts of power, how much work was done?
    10000 Joules
    20000 Joules
    30000 Joules
    25000 Joules
    30s
  • Q7
    A motor uses 1500 Joules of energy to move a load 25 meters. What is the force exerted by the motor?
    70 N
    60 N
    50 N
    100 N
    30s
  • Q8
    A 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 Watts
    800 Watts
    1000 Watts
    200 Watts
    30s
  • Q9
    A fan operates by using 180 Joules of energy to move air for 2 minutes. What is the average power consumption of the fan?
    90 Watts
    180 Watts
    1.5 Watts
    3 Watts
    30s

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