Unit 2, Kinematic and dynamics, but in a CIRCLE Flashcards
Define Period
time to complete 1 revolution
1/f=T or t/n
Define Frequency
How often something happens
n/t=f or 1/T=f
What is the mathematical relationship between Period and frequency?
inverses, inversely proportional, and opposite reciprocals
How do you calculate the velocity of an moving around a circle?
2πr/T or 2πr*f
What direction is the velocity acting in?
Tangent to the circle
How do you calculate the acceleration of an object moving in a circular path?
a=v/r
What direction does the acceleration act in?
toward the center
How do the directions of the velocity and acceleration relate at any given point during an object rotation?
perpendicular to the center
What is the equation for centripetal force?
F=ma=mv^2/r
What direction does centripetal force act in?
Toward the center
Explain apparent weight, how do we calculate it for the top of a circular path?
At the top, you feel lighter and at the bottom, you feel heavier
When an object experiences uniform circular motion, the direction of the net force is
is directed toward the center of the circular path.
An object travels in a circular path of radius r at a constant speed v. What happens to the object’s acceleration if the radius of the circle is doubled and the speed stays unchanged?
It is cut to a half
A pilot performs a vertical maneuver around a circle with a radius R. Which of the following is true about the pilot’s apparent weight?
It decreases when he moves from the lowest to the highest point of the circle
A boy stands at the edge of a rotating table. Which of the following forces prevents him from sliding off the table?
The static friction
