Starter quiz

  • Which of the following properties of an object affects the amount of energy in its gravitational store?
    • height  ✓
    • mass  ✓
    • speed
    • temperature
  • Why does a free–falling object accelerate downwards?
    • energy is created in the kinetic store
    • energy is lost from the gravitational store
    • energy is transferred to the kinetic store  ✓
    • energy is transferred from the gravitational store  ✓
  • A pupil lifts a box of books off the floor then puts it back down again. How much work is done (compared to the first time) if the box is lifted again to 4× the height?
    • 16× more
    • 4× more  ✓
    • the same amount
    • 4× less
    • 16× less
  • Which of the following is the unit of weight?
    • kilograms (kg)
    • newtons (N)  ✓
    • newtons per kilogram (N/kg)
    • pounds (lb)
  • How would you calculate the work done lifting a sack of onions onto a table?
    • work done = mass of the onions × height of the table
    • work done = mass of the onions ÷ height of the table
    • work done = weight of the onions × height of the table  ✓
    • work done = weight of the onions ÷ height of the table
  • The gravitational force on Earth is 6× greater than it is on the Moon. Starting with the one with the most energy, put the tools in order of decreasing energy in the gravitational store.
    • 1
      ⇔
      A hammer has a mass of 2 kg and is on Earth.
    • 2
      ⇔
      An axe has a mass of 1.5 kg and is on Earth.
    • 3
      ⇔
      A drill has a mass of 3 kg and is on the Moon.
    • 4
      ⇔
      An electric saw has a mass of 2 kg and is on the Moon.
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