Types of Energy and Work
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Questions and Answers

What is the SI unit of work?

  • Newton (N)
  • Joule (J) (correct)
  • Watt (W)
  • Second (s)

    • Which type of energy is associated with moving objects?

  • Potential energy
  • Mechanical energy (correct)
  • Electrical energy
  • Chemical energy

    • What is the mathematical expression for kinetic energy?

  • $\frac{m}{s} \times v^2$
  • $\frac{m}{2} \times v^2$ (correct)
  • $m \times v^2$
  • $\frac{m}{2s} \times v^2$

    • What is the law of conservation of energy?

    <p>Energy can neither be created nor destroyed, it can only change forms</p> Signup and view all the answers

    What is the rate of doing work known as?

    <p>Power</p> Signup and view all the answers

    What is the unit of power in the SI unit system?

    <p>$Watt (W)$</p> Signup and view all the answers

    What is the mathematical expression for work?

    <p>Work = Force × Displacement</p> Signup and view all the answers

    Why is work considered a scalar quantity?

    <p>Because force and displacement are both scalar quantities</p> Signup and view all the answers

    In which unit is work measured?

    <p>Joule (J)</p> Signup and view all the answers

    Under what condition does the force cause work?

    <p>When the object moves in the direction of the force</p> Signup and view all the answers

    What type of work occurs when a body falls under gravity?

    <p>Positive work</p> Signup and view all the answers

    What is energy defined as?

    <p>The ability to do work</p> Signup and view all the answers

    What is the mathematical expression for work?

    <p>$W = F \times s$</p> Signup and view all the answers

    Why is work considered a scalar quantity?

    <p>Because work does not depend on the direction of the force</p> Signup and view all the answers

    What is the SI unit of work?

    <p>Joule</p> Signup and view all the answers

    In which kind of work does the displacement occur in the direction of the force?

    <p>Positive work</p> Signup and view all the answers

    What kind of work occurs if the displacement is opposite to the direction of the force?

    <p>Negative work</p> Signup and view all the answers

    When does zero work occur?

    <p>When there is no displacement but force is applied</p> Signup and view all the answers

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