Power

• What is the equation for Power?

  Power = Work done/Time
• What unit is power in?

  Watts or Joules
• What unit is TIME in?

  Seconds
• What unit is Work done in?

  Joules
• What is the equation for Force ?

  Force = Work done/ Distance
• What unit is force in?

  Newtons
• What unit is Distance in?

  Metres
• How is power defined in physics?

  Power is the rate at which energy is transferred or the rate at which work is done
• What is the formula for calculating power using energy transferred?

  Power in watts = energy transferred in joules / time in seconds
• What is the formula for calculating power using work done?

  Power in watts = work done in joules / time in seconds
• What is the unit for power and its symbol?

  The unit for power is the Watt, symbolized as capital W
• How much energy transfer corresponds to one Watt?

  One Watt is an energy transfer of one Joule per second
• If a bunsen burner transfers 250,000 Joules of thermal energy in 500 seconds, what is its power?

  The power is 500 watts
• If a bunsen burner transfers 180,000 Joules of thermal energy in 500 seconds, what is its power?

  The power is 360 watts
• How do you calculate the power of brakes if 40,000 Joules of work is done in 5 seconds?

  The power is 8,000 watts
• What is the power of motor A that transfers 500 Joules of energy in 40 seconds?

  The power is 12.5 watts
• What is the power of motor B that transfers 500 Joules of energy in 60 seconds?

  The power is 8.3 watts to one decimal place
• What are the key concepts related to power in physics?

  • Power is the rate of energy transfer or work done
  • Power can be calculated using energy or work done
  • The unit of power is the Watt (W)
  • One Watt equals one Joule per second
• How do you calculate power from energy transferred and time?

  • Use the formula: Power (W) = Energy transferred (J) / Time (s)
  • Example: For 250,000 J in 500 s, Power = 500 W
• How do you calculate power from work done and time?

  • Use the formula: Power (W) = Work done (J) / Time (s)
  • Example: For 40,000 J in 5 s, Power = 8,000 W