MomentsPressureDensity MCQ1
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Questions and Answers

Which of the following is true about a lever?

  • It cannot rotate
  • It is always rigid
  • It does not involve a fulcrum
  • It is free to rotate about a fixed axis (correct)

    • What is the unit of moment?

  • N/m
  • Nm (correct)
  • kg⋅m/s²
  • kg/m

    • If two parallel forces with the same magnitude act in opposite directions, what are they called?

  • Opposite forces
  • Couple (correct)
  • Converging forces
  • Diverging forces

    • What is the torque of a couple equal to?

    <p>The magnitude of one force multiplied by the distance between them</p> Signup and view all the answers

    What is the SI unit of pressure?

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

    Which law states that any two point masses in the universe attract each other with a force proportional to the product of their masses and inversely proportional to the square of the distance between them?

    <p>Newton's Law of Universal Gravitation</p> Signup and view all the answers

    What instrument is used to measure the density of a liquid based on how deeply it sinks into the liquid?

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

    In free fall, an object experiences acceleration due to gravity causing it to accelerate. What is this called, eventually it reaches a speed such that it accelrates no more, what do we call this?

    <p>Terminal velocity</p> Signup and view all the answers

    What principle states that when a body is immersed in a fluid, it experiences an upthrust equal to the weight of the fluid displaced?

    <p>Archimedes Principle</p> Signup and view all the answers

    What happens when a diver experiences 'The Bends'?

    <p>Formation of nitrogen gas bubbles in their bloodstream due to a change in pressure</p> Signup and view all the answers

    What is a fulcrum?

    <p>A fixed point around which a rigid body can rotate</p> Signup and view all the answers

    What is density defined as?

    <p>Mass per unit volume (m/V)</p> Signup and view all the answers

    What factor affects how deeply a hydrometer sinks in a liquid?

    <p>Density of the liquid</p> Signup and view all the answers

    What is the relationship between pressure and depth in a fluid?

    <p>Pressure increases with depth</p> Signup and view all the answers

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