50 Questions
What is the force required to keep a body moving along a curved path called?
Centripetal force
Which force is responsible for tilting or moving the body along a radially outward direction?
Centrifugal force
How is angular acceleration defined?
Rate of change of angular velocity with respect to time
Which rule can be used to represent angular acceleration as a vector quantity?
Right hand rule
What does the vector xx' represent in the context of angular velocity change?
Change of angular velocity in time
In which direction does the centrifugal force act on a body moving with uniform linear velocity along a circular path?
Radially outwards
What is the effect of the active gyroscopic couple on an airplane during a left-hand turn?
Raise the nose
Which term is used for the front end of a naval ship?
Bow
What does pitching refer to in the context of a naval ship?
Moving the ship up and down in a vertical plane
What will the reactive gyroscopic couple try to do if the pitching of a ship is upward?
Turn towards star-board
In what direction will the active gyroscopic couple act on a naval ship during steering when taking a left turn?
Clockwise
What does the reactive gyroscopic couple try to do if the pitching of a ship is downward?
Turn towards port side
Which part of an airplane will experience a change in angular momentum vector during a left-hand turn?
Nose
What term is used for the rear end of a naval ship?
Stern
What does rolling refer to in the context of naval ships?
Axis of spin about transverse axis.
What is the effect of reactive gyroscopic couple in naval ship if pitching is downward?
Turn towards port side.
What is the mass moment of inertia of the rotor?
2880 kg-m2
What is the angular velocity of precession?
0.37 rad/s
What is the gyroscopic couple (C) value?
200.866 N-m
In which direction does the reactive gyroscopic couple effect raise the bow and lower the stern?
Raise the bow and lower the stern
Where are gyroscopes commonly used due to their precision?
Gyrotheodolites
What is the angular velocity of the axis of spin known as?
Angular velocity of precession
What is the axis about which the axis of spin is to turn called?
Axis of precession
What is represented by the vector xx' in the context of angular momentum?
Change in angular momentum
What is the plane XOY referred to as in the context of gyroscopic couple?
Plane of active gyroscopic couple
When the axis of spin itself moves with angular velocity P, what couple is the disc subjected to?
Reactive gyroscopic couple
In which direction does the active gyroscopic couple I..p act?
In the direction of vector xx'
What does the plane XOY represent in relation to the gyroscopic principle?
Plane of active gyroscopic couple
What is the effect of the gyroscopic couple on an airplane?
Minimizes rolling and pitching effects
What is denoted by P in this context?
Angular velocity of precession
What is another name for the axis OZ'?
Axis of active gyroscopic couple
What condition must be met for the effect of gyroscopic couple to occur?
The axis of precession should always be perpendicular to the axis of spin
In a naval ship rolling, why is there no effect of gyroscopic couple on the ship's body?
The axis of precession is parallel to the axis of spin
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?
Inner wheels will leave the ground
What is the formula for the gyroscopic couple due to the rotating parts of an engine?
$IE.E.P$
How are the reactions on the road surface distributed in a four-wheel drive vehicle moving in a curved path?
Equally distributed over all four wheels
What causes the outer wheels of a vehicle moving in a curved path to have vertical reactions upwards?
Gyroscopic couple
What is responsible for producing vertical reactions downwards on the inner wheels of a vehicle moving in a curved path?
$W.P (4 IW ± G.IE)$
Which factor determines if inner wheels will leave the ground in a moving vehicle?
$P/2 + Q/2$
How does centrifugal force affect a vehicle moving along a curved path?
It acts outwardly at the center of gravity
What is responsible for maintaining contact between inner wheels and the ground in a vehicle moving at high speeds?
Sum of P/2 and Q/2 being greater than W/4
What is the angle of heel in a two-wheel vehicle taking a turn?
Angle of inclination
What is the effect of centrifugal couple on a vehicle taking a turn?
Creates a tendency to overturn the vehicle
What is the formula for the centrifugal force acting on a vehicle during a turn?
$m \times v$
What does the gyroscopic couple do when an aircraft turns towards the left?
Lifts the nose upwards
What is the formula for mass moment of inertia of a rotating part like a wheel or engine?
$I = m \times k^2$
In which direction does the balancing couple act on a vehicle for stability during a turn?
Clockwise direction
What is the angular velocity of precession for a disc rotating about an arm with speed 300 rpm?
$16.7$ rad/s
What does the angle of spin refer to in a two-wheel vehicle during a turn?
Angle of inclination
What is the effect of gyroscopic couple on an aeroplane making a half circle towards left?
Lifts nose upwards
Test your knowledge on centripetal and centrifugal forces, which are essential for understanding the motion of bodies along curved paths. Learn about active and reactive forces and how they come into play when an object moves in a circular motion.
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