work done and power

• What is the definition of work done?

  Work is done when a force moves an object
• How does the distance moved affect the work done when pushing an object?

  More distance results in more work done
• If a box is pushed with a force of 10 newtons over a distance of 5 meters, what is the work done?

  50 joules
• If you lift 20 joules of work in 4 seconds, what is your power?

  5 watts
• How does carrying heavy books slowly compare to running with them in terms of power?

  It takes more time and uses less power
• If you push a box with a greater force, what happens to the work done?

  The work done increases
• How is power calculated using work and time?

  Power is calculated by dividing work by time
• What does power tell us about work?

  How quickly you do work
• What is the unit of power?

  Watts (W)
• What are the components involved in calculating work done?

  • Force (measured in newtons)
  • Distance (measured in meters)
• What does the calculation 20 J ÷ 4 s represent in the context of power?

  The power output when lifting work
• What does power show in relation to work?

  How fast you do work
• If lifting a box takes the same work, what does lifting it quickly increase?

  Power
• How does the speed of lifting a box affect power?

  More speed means more power
• What does the formula for power indicate?

  Power equals work done divided by time
• What is the formula for power?

  Power = Work Done ÷ Time
• What is the unit of work?

  Joules (J)
• How is work done calculated when pushing an object?

  By multiplying the force by the distance
• How do you calculate power from work and time?

  Power = Work ÷ Time
• What are the relationships between work, power, and time?

  • Work is measured in joules (J)
  • Power is measured in watts (W)
  • Power = Work ÷ Time
• What does the formula for work done represent?

  It represents force multiplied by distance
• How does the concept of power relate to the efficiency of performing work?

  Higher power indicates quicker work completion
• What factors determine the amount of work done?

  Force applied and distance moved
• What are the key differences between work and power?

  • Focus:
  • Work: Amount of effort
  • Power: Speed of effort
  • Formula:
  • Work: $Force \times Distance$
  • Power: $Work \div Time$
  • Unit:
  • Work: Joules (J)
  • Power: Watts (W)
• What is the formula for work done?

  Work Done = Force × Distance
• What is the difference between work and power?

  • Work measures effort needed
  • Power measures how quickly effort is applied
• How is a watt defined in terms of joules?

  1 watt equals 1 joule per second
• What does a joule measure in terms of work?

  Energy needed to push 1 newton over 1 meter