Physics - Recall for Chapter 16; Circular Motion
Flashcards
2022-04-20
What are the SI units of angular velocity?
What is the word definition of angular velocity?
The rate of change of angle.
How can you calculate angular velocity $\omega$ from $T$ or $f$?
What is required for uniform circular motion?
A force that always acts perpendicular to velocity.
Why doesn’t a centripetal force do any work on an object in circular motion?
The force is perpendicular to the motion.
How can you calculate the linear velocity $v$ from the time period $T$ for an object in circular motion?
How can you calculate linear velocity $v$ from angular velocity $\omega$?
What is the direction of velocity of an object travelling in a circle at constant speed?
At the tangent to the circle it’s moving along.
What provides the centripetal force for a car turning a corner?
Friction from the road on the tyres.
What provides the centripetal force on the moon?
The gravitational attraction of the Earth.
What is the name for the resultant force on an object in circular motion?
Centripetal force.
If a mass on a string is swung in a vertical circle, where is the tension the greatest?
At the bottom of the circle.
If a mass on a string is swung in a vertical circle, where is tension the least?
At the top of the circle.