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HDHS Trilogy P1 Checkpoint quiz: Conservation and dissipation of energy

Quiz by Alexandra Gill

GCSE (AQA)
Combined Science: Trilogy
English National Curriculum

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14 questions
Show answers
  • Q1
    Which of the following is an energy store?
    electrical current
    heating
    waves
    thermal
    60s
    6.1.1.1
  • Q2
    Which of the following involves useful energy transfers by heating and by a force?
    cooking a pizza in an electric oven
    going up in a lift
    drying clothes in a tumble dryer
    drying clothes in a tumble dryer
    60s
    6.2.4.2
  • Q3
    Calculate how much work is done when a force of 1600 N pulls a car through a distance of 40 m in the direction of the force.
    40 J
    40 N
    64 000 J
    64 000 N
    300s
    6.5.2
  • Q4
    Read the descriptions below about energy transfers when a heavy object is dropped. Only one description is correct. Select the correct description.
    Before the object is dropped all of the energy is in the gravitational potential energy store. As the object falls, energy is transferred to the kinetic energy store. When the object hits the ground all of the energy from the kinetic energy store is transferred to the thermal energy store by heating, and as sound waves.
    Before the object is dropped all of the energy is in the kinetic energy store. As the object falls the kinetic energy store gets bigger. When the object hits the ground all of the energy from the kinetic energy store is transferred to the thermal energy store by heating, and as sound waves.
    Before the object is dropped all of the energy is in the gravitational potential energy store. As the object falls energy is transferred to the kinetic energy store. When the object hits the ground the energy from the kinetic energy store is lost.
    Before the object is dropped all of the energy is in the gravitational potential energy store. As the object falls energy from the gravitational potential energy store is lost. By the time the object hits the ground there is no more energy left.
    120s
    6.1.2.1
  • Q5
    Which of the following statements about a closed system is correct?
    some of the energy is dissipated from the system
    there is no transfer of energy within the system
    the total energy is always the same before and after an energy transfer
    60s
    6.1.1.3
  • Q6
    A person climbs up some stairs. Which sentence about the change in energy stores is correct?
    The change in the kinetic energy store depends on the person’s weight and the change in height.
    The change in the gravitational potential energy store depends on the weight of the person and the change in height.
    The change in the gravitational potential energy depends on the person’s mass and their change in weight.
    The change in the kinetic energy store depends on the person’s mass and the change in height.
    60s
    6.1.1.3
  • Q7
    Put these sentences in order to describe what happens when a ball falls.
    Question Image
    CADBFE
    FCDEAB
    BDEAFC
    DBACFE
    120s
    6.1.1.3
  • Q8
    A motor transfers 12 kJ of energy in 30 s. Calculate its power.
    400 W
    400 J
    360 kW
    400 W
    300s
    6.1.1.4
  • Q9
    A suitcase of mass 20 kg moves along a conveyor belt at 0.5 m/s. Calculate its kinetic energy
    2.5 J
    10 J
    5 J
    5 kJ
    300s
    6.1.1.2
  • Q10
    A motor has an input power of 120 W and is 40 % efficient. Calculate the power wasted by the motor.
    3 W
    4800 W
    72 W
    48 W
    300s
    6.1.1.4
  • Q11
    A spring with a spring constant of 50 N/m is stretched by an extension of 2 cm. Calculate the energy in its elastic energy potential store.
    0.5 J
    50 J
    0.01 J
    100 J
    300s
    6.1.1.2
  • Q12
    The table shows the power ratings of some different appliances. Place the appliances in order of power rating, starting with the lowest power rating.
    Question Image
    BADC
    CBDA
    ABCD
    BDCA
    300s
    6.1.1.4
  • Q13
    A machine is 40 % efficient. The total energy supplied to the machine is 4 kJ. Calculate how much useful energy can be transferred.
    10 kJ
    100 J
    1600 J
    1.6 J
    300s
    6.1.2.1
  • Q14
    The springs in a car’s suspension have a spring constant of 50 000 N/m. The elastic potential energy store is 0.025 J. Calculate the extension of the springs.
    0.01 mm
    10 mm
    1 mm
    625 mm
    300s
    6.1.1.3

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