Non-Constant Parameters in Motion Kinematics
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Questions and Answers

What is the upper limit of the speed of the vehicle at the topmost point of the convex over bridge?

  • $\dfrac{rg}{11}$ (correct)
  • $\dfrac{rg}{12}$
  • $\dfrac{rg}{14}$
  • $\dfrac{rg}{13}$
  • What imposes an upper limit on the speed of the vehicle at the uppermost position?

  • Friction acting on the vehicle
  • Increased weight of the vehicle
  • Normal reaction force going to zero (correct)
  • Decreasing centripetal force
  • What is the major force experienced during a roller coaster ride?

  • Normal reaction force (correct)
  • Weight force
  • Friction force
  • Centripetal force
  • What is the value of maximum velocity experienced in a roller coaster ride described in the text?

    <p>$10$ m/s</p> Signup and view all the answers

    What happens to the normal reaction force as the speed of the vehicle is increased?

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

    Why are the kinematical equations given in the table1 not applicable in the described motion?

    <p>None of the parameters, including accelerations, are constant.</p> Signup and view all the answers

    What indicates an upper limit on the speed at the uppermost point of the motion?

    <p>Normal reaction force becoming zero</p> Signup and view all the answers

    How can we determine the position vector or velocity at any instant in the described scenario?

    <p>Through energy conservation.</p> Signup and view all the answers

    What do equations (1.10) and (1.13) provide in the scenario?

    <p>Minimum speeds at all points.</p> Signup and view all the answers

    Why is a certain minimum speed necessary at the uppermost point for a string and not for a rod?

    <p>Strings are not rigid and need tension.</p> Signup and view all the answers

    What is required continuously to overcome air resistance in reality?

    <p>Additional energy supply.</p> Signup and view all the answers

    What is essential for a motion to be circular?

    <p>Matching tangential velocity</p> Signup and view all the answers

    Why is practically zero speed possible at the uppermost point for a rod?

    <p>Rods are rigid.</p> Signup and view all the answers

    In an inertial frame of reference, how is a body observed when performing a circular motion?

    <p>Performing circular motion</p> Signup and view all the answers

    What is the magnitude of the centrifugal force in a uniform circular motion?

    <p>$mv^2/r$</p> Signup and view all the answers

    What is the direction of the centrifugal force in a circular motion?

    <p>Away from the center</p> Signup and view all the answers

    What can be noticed when a mass performs horizontal motion on a spring balance?

    <p>The balance reads more mass</p> Signup and view all the answers

    What does Figure 1.4 show in relation to a car on a horizontal circular track?

    <p>A vertical section of the car</p> Signup and view all the answers

    What type of republic is India according to the Preamble of the Constitution of India?

    <p>Sovereign Socialist Secular Democratic Republic</p> Signup and view all the answers

    Which of the following is NOT one of the values promised to Indian citizens in the Preamble?

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

    When was the Constitution of India adopted by the Constituent Assembly?

    <p>26th November, 1949</p> Signup and view all the answers

    Who is mentioned as the publisher in the provided text?

    <p>Vivek Uttam Gosavi</p> Signup and view all the answers

    Which value mentioned in the Preamble aims to assure the dignity of the individual and unity of the Nation?

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

    What is the main purpose of the Constitution of India as stated in the Preamble?

    <p>To ensure justice for all citizens</p> Signup and view all the answers

    What is the angle of contact when a liquid completely wets a solid surface?

    <p>Almost zero degrees</p> Signup and view all the answers

    In the case where T2 > T1 and (T2-T1) < T3, what is the nature of the angle of contact θ?

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

    Which force is the resultant force when the angle of contact is zero?

    <p>Adhesive force</p> Signup and view all the answers

    What does it mean when θ → 00?

    <p>The cohesive force is negligible</p> Signup and view all the answers

    In Fig. 2.19 (c), why is the angle of contact almost zero?

    <p>Because the liquid molecules near the contact region are few in number</p> Signup and view all the answers

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