Centripetal and Centrifugal Forces Quiz
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Questions and Answers

What is the force required to keep a body moving along a curved path called?

  • Centripetal force (correct)
  • Reactive force
  • Centrifugal force
  • Angular force

    • Which force is responsible for tilting or moving the body along a radially outward direction?

  • Angular force
  • Inertial force
  • Centrifugal force (correct)
  • Active force

    • How is angular acceleration defined?

  • Rate of change of acceleration
  • Rate of change of angular velocity with respect to time (correct)
  • Rate of change of mass
  • Rate of change of linear velocity

    • Which rule can be used to represent angular acceleration as a vector quantity?

    <p>Right hand rule</p> Signup and view all the answers

    What does the vector xx' represent in the context of angular velocity change?

    <p>Change of angular velocity in time</p> Signup and view all the answers

    In which direction does the centrifugal force act on a body moving with uniform linear velocity along a circular path?

    <p>Radially outwards</p> Signup and view all the answers

    What is the effect of the active gyroscopic couple on an airplane during a left-hand turn?

    <p>Raise the nose</p> Signup and view all the answers

    Which term is used for the front end of a naval ship?

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

    What does pitching refer to in the context of a naval ship?

    <p>Moving the ship up and down in a vertical plane</p> Signup and view all the answers

    What will the reactive gyroscopic couple try to do if the pitching of a ship is upward?

    <p>Turn towards star-board</p> Signup and view all the answers

    In what direction will the active gyroscopic couple act on a naval ship during steering when taking a left turn?

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

    What does the reactive gyroscopic couple try to do if the pitching of a ship is downward?

    <p>Turn towards port side</p> Signup and view all the answers

    Which part of an airplane will experience a change in angular momentum vector during a left-hand turn?

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

    What term is used for the rear end of a naval ship?

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

    What does rolling refer to in the context of naval ships?

    <p>Axis of spin about transverse axis.</p> Signup and view all the answers

    What is the effect of reactive gyroscopic couple in naval ship if pitching is downward?

    <p>Turn towards port side.</p> Signup and view all the answers

    What is the mass moment of inertia of the rotor?

    <p>2880 kg-m2</p> Signup and view all the answers

    What is the angular velocity of precession?

    <p>0.37 rad/s</p> Signup and view all the answers

    What is the gyroscopic couple (C) value?

    <p>200.866 N-m</p> Signup and view all the answers

    In which direction does the reactive gyroscopic couple effect raise the bow and lower the stern?

    <p>Raise the bow and lower the stern</p> Signup and view all the answers

    Where are gyroscopes commonly used due to their precision?

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

    What is the angular velocity of the axis of spin known as?

    <p>Angular velocity of precession</p> Signup and view all the answers

    What is the axis about which the axis of spin is to turn called?

    <p>Axis of precession</p> Signup and view all the answers

    What is represented by the vector xx' in the context of angular momentum?

    <p>Change in angular momentum</p> Signup and view all the answers

    What is the plane XOY referred to as in the context of gyroscopic couple?

    <p>Plane of active gyroscopic couple</p> Signup and view all the answers

    When the axis of spin itself moves with angular velocity P, what couple is the disc subjected to?

    <p>Reactive gyroscopic couple</p> Signup and view all the answers

    In which direction does the active gyroscopic couple I..p act?

    <p>In the direction of vector xx'</p> Signup and view all the answers

    What does the plane XOY represent in relation to the gyroscopic principle?

    <p>Plane of active gyroscopic couple</p> Signup and view all the answers

    What is the effect of the gyroscopic couple on an airplane?

    <p>Minimizes rolling and pitching effects</p> Signup and view all the answers

    What is denoted by P in this context?

    <p>Angular velocity of precession</p> Signup and view all the answers

    What is another name for the axis OZ'?

    <p>Axis of active gyroscopic couple</p> Signup and view all the answers

    What condition must be met for the effect of gyroscopic couple to occur?

    <p>The axis of precession should always be perpendicular to the axis of spin</p> Signup and view all the answers

    In a naval ship rolling, why is there no effect of gyroscopic couple on the ship's body?

    <p>The axis of precession is parallel to the axis of spin</p> Signup and view all the answers

    What will happen if the sum of P/2 and Q/2 equals W/4 in a four-wheel vehicle moving in a curved path?

    <p>Inner wheels will leave the ground</p> Signup and view all the answers

    What is the formula for the gyroscopic couple due to the rotating parts of an engine?

    <p>$IE.E.P$</p> Signup and view all the answers

    How are the reactions on the road surface distributed in a four-wheel drive vehicle moving in a curved path?

    <p>Equally distributed over all four wheels</p> Signup and view all the answers

    What causes the outer wheels of a vehicle moving in a curved path to have vertical reactions upwards?

    <p>Gyroscopic couple</p> Signup and view all the answers

    What is responsible for producing vertical reactions downwards on the inner wheels of a vehicle moving in a curved path?

    <p>$W.P (4 IW ± G.IE)$</p> Signup and view all the answers

    Which factor determines if inner wheels will leave the ground in a moving vehicle?

    <p>$P/2 + Q/2$</p> Signup and view all the answers

    How does centrifugal force affect a vehicle moving along a curved path?

    <p>It acts outwardly at the center of gravity</p> Signup and view all the answers

    What is responsible for maintaining contact between inner wheels and the ground in a vehicle moving at high speeds?

    <p>Sum of P/2 and Q/2 being greater than W/4</p> Signup and view all the answers

    What is the angle of heel in a two-wheel vehicle taking a turn?

    <p>Angle of inclination</p> Signup and view all the answers

    What is the effect of centrifugal couple on a vehicle taking a turn?

    <p>Creates a tendency to overturn the vehicle</p> Signup and view all the answers

    What is the formula for the centrifugal force acting on a vehicle during a turn?

    <p>$m \times v$</p> Signup and view all the answers

    What does the gyroscopic couple do when an aircraft turns towards the left?

    <p>Lifts the nose upwards</p> Signup and view all the answers

    What is the formula for mass moment of inertia of a rotating part like a wheel or engine?

    <p>$I = m \times k^2$</p> Signup and view all the answers

    In which direction does the balancing couple act on a vehicle for stability during a turn?

    <p>Clockwise direction</p> Signup and view all the answers

    What is the angular velocity of precession for a disc rotating about an arm with speed 300 rpm?

    <p>$16.7$ rad/s</p> Signup and view all the answers

    What does the angle of spin refer to in a two-wheel vehicle during a turn?

    <p>Angle of inclination</p> Signup and view all the answers

    What is the effect of gyroscopic couple on an aeroplane making a half circle towards left?

    <p>Lifts nose upwards</p> Signup and view all the answers

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