Physics Revision Work Energy Power SEC 3/4/5

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| By Mrguienghong
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Mrguienghong
Community Contributor
Quizzes Created: 2 | Total Attempts: 3,251
Questions: 6 | Attempts: 178

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Energy Quizzes & Trivia

Questions and Answers
  • 1. 

    A 2N force pushes a box. The box moves 3.0m. How much work is done?

    • A.

      6J

    • B.

      1.5J

    • C.

      6W

    • D.

      1.5W

    Correct Answer
    A. 6J
    Explanation
    work = force x distance

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  • 2. 

    A 4 kg ball moves with 3m/s. what is its kinetic energy?

    • A.

      12J

    • B.

      36J

    • C.

      18J

    • D.

      9J

    Correct Answer
    C. 18J
    Explanation
    kinetic energy = 1/2 x mass x speed x speed

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  • 3. 

    A tennis ball 200g is 2.0m above the ground. G=10N/kg. How much gravitational potential energy does the ball have?

    • A.

      4000J

    • B.

      40J

    • C.

      100J

    • D.

      4J

    Correct Answer
    D. 4J
    Explanation
    mgH ; mass must be in Kg! 0.2kg x 10N/kg x 2 m = 4J

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  • 4. 

    A electric dry cell (battery) is used to power a lamp. what energy conversion takes place?

    • A.

      Chemical --> electrical energy

    • B.

      Chemical --> light energy only

    • C.

      Chemical --> electrical energy --: heat and light energy

    • D.

      Chemical --> electrical energy --: heat energy only

    Correct Answer
    C. Chemical --> electrical energy --: heat and light energy
    Explanation
    The correct answer is "chemical --> electrical energy --: heat and light energy". When an electric dry cell (battery) is used to power a lamp, the chemical energy stored in the battery is converted into electrical energy. This electrical energy is then converted into both heat and light energy, which are the forms of energy that the lamp emits.

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  • 5. 

    Princple of conservation of energy states that energy cannot be created nor destroyed. Energy is transform from one __________ into another.

    Correct Answer
    form
    type
    kind
    Explanation
    The principle of conservation of energy states that energy cannot be created nor destroyed. Instead, it can only be transformed from one form, type, or kind into another. This means that energy can change its manifestation or characteristics, but the total amount of energy in a closed system remains constant.

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  • 6. 

    When a ball is thrown up vertically, its ____________energy decreases, while its gravitational potential energy increases

    Correct Answer
    kinetic
    Explanation
    When a ball is thrown up vertically, its kinetic energy decreases because it is moving against the force of gravity and slowing down. At the same time, its gravitational potential energy increases because it is moving higher against the force of gravity.

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  • Current Version
  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jul 20, 2010
    Quiz Created by
    Mrguienghong
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