Rotational Motion

Front

What is rotational motion?

Back

Rotational motion refers to the motion of an object that rotates around an axis. It involves concepts such as angular displacement, angular velocity, and angular acceleration.

Front

What is centripetal acceleration?

Back

Centripetal acceleration is the acceleration directed towards the center of a circular path that keeps an object moving in that path. It is calculated using the formula a_c = v²/r, where v is the linear velocity and r is the radius.

Front

What is the formula for centripetal force?

Back

The formula for centripetal force (F_c) is F_c = m * a_c, where m is the mass of the object and a_c is the centripetal acceleration.

Front

What is frequency in the context of rotational motion?

Back

Frequency is the number of complete revolutions an object makes in one second. It is measured in hertz (Hz).

Front

What is the relationship between period and frequency?

Back

The period (T) is the time taken for one complete revolution, and frequency (f) is the number of revolutions per second. They are related by the formula: f = 1/T.

Front

What is the unit of centripetal force?

Back

The unit of centripetal force is the newton (N).

Front

How does doubling the radius affect centripetal force?

Back

If the radius is doubled while keeping the mass and velocity constant, the centripetal force is halved, as it is inversely proportional to the radius.

Front

Calculate the centripetal acceleration of a 0.2 kg yoyo spun in a circle with a radius of 0.7 m at a velocity of 3 m/s.

Back

12.86 m/s².

Front

What is the effect of mass on centripetal force?

Back

Centripetal force increases with an increase in mass, as it is directly proportional to the mass of the object.

Front

What is torque in rotational motion?

Back

Torque is a measure of the rotational force applied to an object. It depends on the force applied and the distance from the axis of rotation.