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GCSEPhysicsOCRPhysics A (Gateway)Exam Questions7. EnergyConservation of Energy

Conservation of Energy (OCR GCSE Physics A (Gateway))

Exam Questions

59 mins15 questions

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Conservation of Energy

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Conservation of Energy

11 mark

A runner has a mass of 80 kg and moves at a speed of 5 m/ s.

Calculate the kinetic energy of the runner.

Use the equation: kinetic energy = 0.5 × mass × (speed)2

  • 200 J

  • 1000 J

  • 2000 J

  • 40 000 J

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2
Sme Calculator1 mark

A piece of clay is held 1.5 m above the ground. It is then dropped. It lands on the ground without bouncing.

Which option shows the correct path of energy transfer between stores?

  • Kinetic store of the clay

    Gravitational store of the clay

    Elastic potential store of the clay

  • Gravitational store of the person holding the clay

    Kinetic store of the clay

    Nuclear store of the ground

  • Gravitational store of the clay

    Elastic store of the ground

    Chemical store of the clay

  • Gravitational store of the clay

    Kinetic store of the clay

    Thermal store of clay and surroundings

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3
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50 kJ of energy is supplied electrically to a kettle. 1 kJ is dissipated through sound and another 3 kJ is transferred to the thermal store of the kettle itself.

How much energy is transferred to the thermal store of the water?

  • 46 J

  • 54 J

  • 46 000 J

  • 48 000 J

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41 mark

Which of the following has the most kinetic energy?

q13-paper1-june2018-ocr-gcse-physics

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    51 mark

    A boy of mass 65 kg climbs a ladder of height 3.0 m.

    Calculate the gain in potential energy of the boy.

    Use the equation: potential energy = mass × height × gravitational field strength

    Gravitational field strength = 10 N/kg.

    • 30 J

    • 195 J

    • 650 J

    • 1950 J

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    61 mark

    A car has a mass of 1000 kg and is travelling at a speed of 20 m/s.

    Calculate the kinetic energy of the car.

    • 10 000 J

    • 20 000 J

    • 200 000 J

    • 400 000 J

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    71 mark

    A car has a mass of 1000 kg and a kinetic energy of 12500 J.

    Calculate its speed.

    Use the equation: kinetic energy = 0.5 × mass × (speed)2 

    • 3.5 m/s

    • 5.0 m/s

    • 6.3 m/s

    • 25.0 m/s

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    81 mark

    A boy kicks a football with a mass of 400 g.

    q2-paper4-specimen-ocr-gcse-physics

    What is the potential energy of the football when it is 0.8 m above the ground?

    • gravitational field strength (g) = 10 N/kg.

    • 0.032 J

    • 3.2 J

    • 320 J

    • 3 200J

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    91 mark

    The kinetic energy of motorbike X is 10 kJ.

    Motorbike Y has the same speed but double the mass.

    What is the kinetic energy of motorbike Y?

    Use the equation: kinetic energy = 0.5 × mass × (speed)2

    • 5 kJ

    • 10 kJ

    • 20 kJ

    • 40 kJ

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    101 mark

    A ball is thrown vertically into the air.

    q4-paper4-oct-nov2020-ocr-gcse-physics

    Energy is transferred from a chemical store.

    Where is the useful energy transferred to?

    • A gravitational store and a thermal store only.

    • A gravitational store only.

    • A gravitational store and a chemical store only.

    • A thermal store and a chemical store only.

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