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GCSEPhysicsOCRPhysics A (Gateway)Exam Questions2. ForcesWork Done & Energy Transfer

Work Done & Energy Transfer (OCR GCSE Physics A (Gateway))

Exam Questions

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Work Done & Energy Transfer

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Work Done & Energy Transfer

1
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What is 250 J converted into newton-metres?

  • 2.5 N m

  • 25 N m

  • 250 N m

  • 2500 N m

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2
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A sledge is pushed up a hill by a force F.

Diagram of a block on an inclined plane with arrows showing forces. The plane's dimensions are labelled x, y, z, with force F parallel to the slope. Y is the distance parallel to the slope. x is the vertical height of the slope. Z is the horizontal length of the slope.

Which distance should be used to calculate the work done on the sledge?

  • x

  • y

  • z

  • x space plus space z

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31 mark

An object moved 20 cm with a force of 20 N.

Use the equation: work done = force × distance

Which is the correct calculation of work done?

  • 0.4 J

  • 4.0 J

  • 40 J

  • 400 J

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41 mark

A student uses 2250 J of energy climbing up steps. It takes the student 15 seconds to climb the steps.

What is the power of the student?

Use the equation: power = work done ÷ time taken

  • 15 W

  • 150 W

  • 9000 W

  • 33 750 W

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51 mark

A student of weight W runs up a flight of stairs.

q6-paper3-june2018-ocr-gcse-physics

They move a horizontal distance d and a vertical distance h.

What is the work done against gravity running up the stairs?

  • W space cross times space d

  • W space cross times space h

  • open parentheses W space cross times space d close parentheses space plus space open parentheses W space cross times space h close parentheses

  • W space cross times space h over d

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61 mark

Which sentence is the definition of the power of a machine?

  • The amount of work done by the machine.

  • The efficiency of the machine.

  • The number of joules of energy the machine requires to work.

  • The rate at which energy is transferred by the machine.

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7
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What is the work done when a box is pushed along a horizontal surface through a distance of 0.10 km using a force of 150 N?

  • 1.5 J

  • 15 J

  • 1500 J

  • 15 000 J

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8
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Which row in the table shows the combination of force and distance where the least work is done?

 

Force (N)

Distance moved (m)

A

20

10

B

40

10

C

50

5

D

70

5

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    9
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    Four different electric bicycles are driven along a road.

    The work done by each bicycle's motor and the operation time are shown in the table below.

    Which of the electric bicycles produces the most power?

     

    Work done (J)

    Time (s)

    A

    10 000

    20

    B

    20 000

    20

    C

    40 000

    40

    D

    80 000

    40

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      10
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      A forklift truck lifts a heavy box onto a shelf. 

      Illustration of a forklift with a box on its lift, positioned next to labelled high and low shelves, indicating the storage height options.

      Which of the following would require the greatest power output from the forklift truck?

      • Lifting the box from the ground to the high shelf at a slow rate

      • Lifting the box from the ground to the high shelf at a fast rate

      • Lifting the box from the low shelf to the high shelf at a fast rate

      • Lifting the box from the low shelf to the high shelf at a slow rate

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