Vocab & Definitions
The term that describes an object’s resistance to changes in rotational motion
What is rotational inertia?
The equation used to calculate torque.
What is 𝜏 = r⟂F or 𝜏 = rFsinθ?
The equation that relates tangential (linear) velocity to rotational velocity.
What is v = rω?
Calculate the torque from a 50 N force applied 0.2 m from the pivot.
What is 10 N·m?
True or False: Rotational inertia depend only on mass.
What is false? (it also depends on distribution of mass)
The quantity described by the equation L = Iω (define each variable)
What is angular momentum?
Force increases while distance stays the same, so torque will...
What is torque increases?
Two object rotate with the same angular velocity. One has a larger radius than the other. The object with greater tangential velocity is...
What is the object with the larger radius?
Calculate the torque from a 300 N force applied 0.5 m from the pivot.
What is 150 N·m?
As mass is moved farther from the axis of rotation, rotational inertia...
What is increases?
Type of acceleration always points toward the center of a circular path
What is centripetal acceleration?
A clockwise torque and a counterclockwise torque of the same magnitude are applied. The system is experiencing...
What is rotational equilibrium?
A cup rolls in a circle and the top has a larger radius than the bottom. The part of the cup with greater tangential speed is...
What is the top (larger radius)?
An 80 kg person moves at 3 m/s in a circle of radius 2 m. The force towards the center caused by centripetal acceleration required is...
What is 360 N?
When rotational inertia decreases and angular momentum is conserved, angular velocity...
What is increases?
The law of conservation of angular momentum
What is the law that states that angular momentum remains constant when no external torque acts on a system?
On a balanced seesaw, a 100 N child sits 1.5 m from the center. A 300 N child must sit...
What is 0.5 m from the center?
A car with large tires and a car with small tires travel at the same linear speed. The car that has greater angular velocity is...
What is the car with smaller tires?
A 2 kg toy on a 2.5 m string is swung in a circle at 3 m/s. The tension in the string is...
What is 7.2 N?
A skater reduces her rotational inertia to one-half its original value. Her rotational velocity changes by...
What is doubling?