Rotational Dynamics MCQ Study Notes

<p>4 rad/s (A)</p> Signup and view all the answers

<p>Inversely proportional to v² (A)</p> Signup and view all the answers

<p>400 rev (D)</p> Signup and view all the answers

<p>72 N (C)</p> Signup and view all the answers

<p>8 m/s (B)</p> Signup and view all the answers

<p>10 km/h (B)</p> Signup and view all the answers

<p>8π rad/s (A)</p> Signup and view all the answers

<p>5 rad/s (C)</p> Signup and view all the answers

<p>0.25 s (D)</p> Signup and view all the answers

<p>3:2 (B)</p> Signup and view all the answers

<p>45° (B)</p> Signup and view all the answers

<p>R1:R2 (C)</p> Signup and view all the answers

<p>Tangent to the curve path (D)</p> Signup and view all the answers

<p>Horizontal component of normal reaction (A)</p> Signup and view all the answers

<p>Speed and angular velocity (A)</p> Signup and view all the answers

<p>Mutually perpendicular to each other (A)</p> Signup and view all the answers

<p>8π² N (A)</p> Signup and view all the answers

<p>10 m/s (A)</p> Signup and view all the answers

<p>F/4 (C)</p> Signup and view all the answers

<p>0° (C)</p> Signup and view all the answers

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

A motion where an object moves in a circular path at a constant speed.

In uniform circular motion, the direction of linear velocity is tangent to the circular path at any point.

In uniform circular motion, speed and angular velocity remain constant, while position vector continuously changes.

The force that keeps an object moving in a circular path, directed towards the center of the circle.

In uniform circular motion, velocity is perpendicular to the position vector (radius).

The angle between the radius vector and centripetal acceleration is 90 degrees.

Centripetal force (F) = mv²/r, where m is mass, v is velocity, and r is the radius of the circular path.

When finding maximum velocity in a circular motion, knowing the radius and breaking tension of the string allows calculation.

The rate of change of angular displacement of a rotating object, measured in radians per second (rad/s).

The highest speed a vehicle can maintain on a curved path without skidding, influenced by friction and banking (if applicable).

The angle at which a road is inclined to the horizontal, intended to counteract the centrifugal force acting on a vehicle going around a turn.

The acceleration experienced by an object in circular motion, directed towards the center of the circle.

The relationship between the speeds of two vehicles traversing concentric circular tracks in the same time, determined by the radius of each track.

The lowest speed required to maintain circular motion in a rotating system, often at the highest point of rotation, preventing free fall or spilling.

A measure of the resistance to sliding between two surfaces, affected by the condition of the surface (dry or wet).

The ratio of the rotational speeds of the hour hand to the earth in a clock or comparable system.

The highest speed a vehicle can safely navigate a turn without skidding, determined by the friction between tires and road surface and the turn's radius.

When a vehicle's load increases, its maximum safe turning speed decreases due to the increased friction required for the heavier vehicle to turn.

The angle of a banked curve is directly proportional to the square of the maximum speed a vehicle can safely take the turn.

The force exerted by a string on an object moving in a vertical circle, varying depending on the object's position.

The lowest speed an object must have at the top of a vertical circle to maintain its circular path and avoid falling.

The rate of change of angular velocity, representing how quickly an object's rotational speed changes.

The number of complete rotations a flywheel makes during a specific time period.