All Flashcards
What is the effect of increasing the distance of mass from the axis of rotation?
Increases rotational inertia.
What is the effect of applying a net torque to an object?
Causes angular acceleration.
What happens when a figure skater pulls their arms inward during a spin?
Their rotational inertia decreases, and their angular speed increases.
What is the effect of increasing rotational inertia on angular acceleration, given a constant torque?
Decreases angular acceleration.
What happens when an object rolls without slipping?
The linear speed of its center of mass is related to its angular speed by .
Label the forces acting on the block in the diagram.
1: Tension (T) upwards, 2: Weight (mg) downwards
Label the forces acting on the disk in the diagram.
1: Tension (T) tangential, 2: Weight (Mg) downwards, 3: Normal force (N) upwards
In the diagram of a hollow vs. solid cylinder rolling down an incline, which has greater rotational inertia?
The hollow cylinder has a greater rotational inertia.
What is the difference between linear and angular velocity?
Linear velocity: Describes the rate of change of an object's position in a straight line. Angular velocity: Describes the rate of change of an object's angular position during rotation.
How does linear inertia differ from rotational inertia?
Linear inertia (mass): Resistance to changes in linear motion, depends only on mass. Rotational inertia: Resistance to changes in rotational motion, depends on mass and its distribution relative to the axis of rotation.
Compare linear and angular acceleration.
Linear acceleration: The rate of change of linear velocity. Angular acceleration: The rate of change of angular velocity.
Compare force and torque.
Force: A push or pull that causes linear acceleration. Torque: A twisting force that causes angular acceleration.
What is the difference between linear momentum and angular momentum?
Linear momentum: Mass in motion in a straight line. Angular momentum: Rotational inertia in motion.