Rotational Motion

Front

What is angular acceleration?

Back

Angular acceleration is the rate of change of angular velocity over time, typically measured in radians per second squared (rad/s²).

Front

What is the formula to calculate the number of revolutions made by a tire?

Back

Number of revolutions = Distance traveled / Circumference of the tire. Circumference = π * diameter.

Front

What factors affect torque?

Back

Torque is affected by the length of the lever arm and the angle at which the force is applied. Maximum torque occurs with a longer lever arm and force applied perpendicularly.

Front

How do you calculate tangential speed?

Back

Tangential speed (v) = Circumference of the circular path / Time taken. Circumference = 2π * radius.

Front

What is angular velocity?

Back

Angular velocity is the rate of change of angular displacement and is measured in radians per second (rad/s) or degrees per minute.

Front

What is the relationship between linear speed and angular speed?

Back

Linear speed (v) = Angular speed (ω) * radius (r).

Front

What is the unit of torque?

Back

The unit of torque is Newton-meter (N*m).

Front

How do you convert degrees to radians?

Back

To convert degrees to radians, multiply by π/180.

Front

What is the significance of the lever arm in torque calculation?

Back

The lever arm is the perpendicular distance from the axis of rotation to the line of action of the force, and it directly affects the magnitude of torque.

Front

What is centripetal acceleration?

Back

Centripetal acceleration is the acceleration directed towards the center of a circular path, necessary for an object to maintain circular motion.