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

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

<p>Decreases (D)</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. (B)</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 (C)</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. (A)</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. (D)</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. (B)</p> Signup and view all the answers

What is required continuously to overcome air resistance in reality?

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

What is essential for a motion to be circular?

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

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

<p>Rods are rigid. (A)</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 (D)</p> Signup and view all the answers

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

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

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

<p>Away from the center (C)</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 (C)</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 (B)</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 (D)</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 (B)</p> Signup and view all the answers

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

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

Who is mentioned as the publisher in the provided text?

<p>Vivek Uttam Gosavi (B)</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 (D)</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 (A)</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 (A)</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 (B)</p> Signup and view all the answers

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

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

What does it mean when θ → 00?

<p>The cohesive force is negligible (D)</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 (A)</p> Signup and view all the answers

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