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International ASPhysicsEdexcelExam Questions1. Mechanics & MaterialsWork, Energy & Power

Work, Energy & Power (Edexcel International AS Physics)

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1
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A crane lifts a container of weight 4.0 × 105 N through a height of 25m.

Which of the following gives the gravitational potential energy gained by the container in joules?

  • 4.0 × 105 × 9.81 × 25

  • 4.0 × 105 × 25

  • 4.0 × 105 × 25 ÷ 9.81

  • 4.0 × 105 ÷ 9.81

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1
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The diagram shows the momentum of two trolleys, X and Y, before a collision. The mass of each trolley is 0.25 kg.

q3-4-wph14-04-jan-2022-edexcel-int-as-a-level-phy

The two trolleys join together after the collision and move on with a velocity of 1 m s−1 .

q3-4-1-wph14-04-jan-2022-edexcel-int-as-a-level-phy

Which of the following is the kinetic energy of trolley X before the collision?

  • 0.5 J

  • 1 J

  • 2 J

  • 4 J

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2
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A hydroelectric power station has an efficiency of 32%. In one hour the useful energy output of the power station is 1.2 × 1013 J.

Which of the following expressions gives the total power input to the power station in watts?

  • 1.2 space cross times space 10 to the power of 13 space cross times 0.32

  • fraction numerator 1.2 space cross times space 10 to the power of 13 space over denominator 0.32 space cross times 3600 end fraction

  • fraction numerator 1.2 space cross times space 10 to the power of 13 space cross times 0.32 over denominator 3600 end fraction

  • fraction numerator 1.2 space cross times space 10 to the power of 13 space over denominator 0.32 end fraction

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A tractor pulls a trailer a distance s in time t. The useful power output of the tractor is P.

Which of the following equations gives the force F of the tractor on the trailer?

  • F space equals space P t s

  • F space equals fraction numerator P t over denominator s end fraction

  • F equals fraction numerator P s over denominator t end fraction

  • F equals fraction numerator s t over denominator P end fraction

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