Starter quiz

  • Which properties of an object can be increased so it has more energy in its kinetic store?
    • height
    • mass  ✓
    • speed  ✓
    • temperature
  • Why does a shopping trolley that has been pushed and then let go of come to a stop?
    • it runs out of energy
    • energy is transferred to the surroundings  ✓
    • a gravitational force pushes down on it
  • What happens to the amount of work done moving a car, if the car is pushed with the same size force for three times the distance?
    • One third of the work.
    • The same amount of work.
    • Three times the work.  ✓
    • Nine times the work.
  • In which of these situations does the applied force not do any work?
    • Pushing a trolley forward to speed it up.
    • Pushing a trolley forward against friction, to keep it at the same speed.
    • Pushing down on a trolley as it moves forwards.  ✓
    • Pushing on a trolley backwards to slow it down.
  • How would you calculate the work done by a catapult in shooting a small ball forward?
    • Work done = force of catapult × distance over which it pushes on the ball  ✓
    • Work done = force of catapult ÷ distance over which the ball moves
    • Work done = force of catapult × mass of the ball
    • Work done = force of catapult ÷ mass of the ball
  • A catapult does work on a small ball to fire it vertically up into the air. What is the amount of work done on the ball equal to?
    • Energy in the kinetic store as the ball leaves the catapult.  ✓
    • Energy in the kinetic store at its highest point.
    • The energy in the gravitational store when the ball leaves the catapult.
    • Energy in the gravitational store at its highest point.
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