Equations
This is the equation for Orbital period, as related to frequency.
What is T = 1 / f
This is the force keeping the Earth revolving around the Sun.
What is Gravity?
This word is used to describe how much time it takes for an object to make one rotation or revolution.
What is (orbital) period?
An object that spins 5 times in 1 second will have this orbital period (must provide units).
What is 0.2 seconds?
If the speed of an object moving in a circle speeds up but the radius is constant, its acceleration does this. (choose: INCREASES, DECREASES, STAYS SAME).
What is INCREASES?
This is the equation for centripetal force, from Newton's Second Law (must show subscripts).
What is Fc = mac (the c's are subscripts)?
What is tension?
This causes an object to move in circular motion.
What is a CENTRIPETAL force?
An object in uniform circular motion orbits with a 1.0 meter radius and has an orbital period of 2 seconds. This would be its SPEED (provide units).
What is 3.14 m/s?
If the speed of an object moving in a circle stays constant but the radius of orbit is INCREASED, its acceleration does this. (choose: INCREASES, DECREASES, STAYS SAME).
What is DECREASES?
This is the equation for the speed of an object moving in uniform circular motion.
What is v = 2(pi)r / T?
This force will keep a car moving in a circle on the off-ramp as it exits the highway.
What is friction?
When solving for apparent weight, this is the quantity you are really solving for.
What is normal force?
A ball on a string in uniform circular motion has a force of 30 Newtons. If its centripetal acceleration is 10 m/s2, this its mass (must provide units).
What is 3 kg?
Mathematically speaking, when one quantity goes up and the other goes down, the quantities are said to be this.
What are INVERSES?
This is the equation for the acceleration of an object moving in uniform circular motion.
What is a = v^2 / r ?
While many people confuse this with a force, it will keep you moving straight and not in a circle.
What is inertia?
This is an imaginary force called Centrifugal force, directed away from the center of a circle. This is generally what people "feel" when moving fast in a circle, like they are being flung out of the circle. The actual thing being felt is ________, their tendency to keep in a state of motion.
What is INERTIA?
An object revolves in uniform circular motion. If it has a radius of orbit of 2 meters and an orbital period of 2 seconds, this would be the ACCELERATION of the object (provide units).
What is 19.7 m/s2?
A roller coaster rider has a mass of 50 kg. At the bottom-most dip of the ride, the section of track has a radius of 20 meters and the rider will be traveling at 20 m/s. This would be the rider's apparent weight.
What is 1,490 Newtons?