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remains constant
In circular motion, the velocity changes and the speed …
perpendicular
In circular motion, acceleration and velocity are …
both tangential and radical acceleration
when a body moves along a circular path with variable speed, what does it have?
circular projectile
When a force of constant magnitude acts on a particle and is always perpendicular to the particle’s motion, the motion is…
w^2r
if a particle is moving in a uniform circular motion, the radial acceleration is given by-
centripetal force
what kind of force would we apply to cause something to move in a circular path?
2 forces act on the rock and the resultant is zero
when a rock is attached to a string and made to swing in a vertical circle what will happen when the rock reaches the highest point?
angular displacement
shortest distance between two points, with a change in angle
circular motion
when an object moves in a circle
one radian
When an object is in a circular motion the arc length is equal to the radius of the circular, then the angular displacement 0 is one radian, r=s
angular speed
rate of change of angular displacement
rotation
when something spins around on an axis
revolution
when an object turns/revolves around another
angular acceleration
rate of change of angular velocity
centripetal acceleration
An object traveling in a circle, even though it moves with a constant speed, will accelerate
level curves
friction is the force that produces centripetal acceleration
banked curves
a component of normal force adds to the frictional force to allow higher speeds
horizontal circle
the horizontal component of the tension causes the centripetal acceleration
Newton’s Law of Universal Gravitation
Every particle in the universe attracts every other particle with a force that is directly proportional to the product of the masses and inversely proportional to the square of the distance between them
escape speed
the speed needed for an object to soar off into space and not return
kepler’s first law
all planets move in elliptical orbits with the cun at one focus
kepler’s second law
a line drawn from the Sun to any planet will sweep out equal areas at equal times
kepler’s third law
the square of the orbital period of any planet is proportional to cube of the average distance from the sun to the planet
Note 
Flashcard (58)