In circular motion, the velocity changes and the speed …
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perpendicular
In circular motion, acceleration and velocity are …
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both tangential and radical acceleration
when a body moves along a circular path with variable speed, what does it have?
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circular projectile
When a force of constant magnitude acts on a particle and is always perpendicular to the particle’s motion, the motion is…
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w^2r
if a particle is moving in a uniform circular motion, the radial acceleration is given by-
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centripetal force
what kind of force would we apply to cause something to move in a circular path?
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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?
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angular displacement
shortest distance between two points, with a change in angle
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circular motion
when an object moves in a circle
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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
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angular speed
rate of change of angular displacement
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rotation
when something spins around on an axis
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revolution
when an object turns/revolves around another
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angular acceleration
rate of change of angular velocity
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centripetal acceleration
An object traveling in a circle, even though it moves with a constant speed, will accelerate
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level curves
friction is the force that produces centripetal acceleration
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banked curves
a component of normal force adds to the frictional force to allow higher speeds
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horizontal circle
the horizontal component of the tension causes the centripetal acceleration
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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
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escape speed
the speed needed for an object to soar off into space and not return
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kepler’s first law
all planets move in elliptical orbits with the cun at one focus
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kepler’s second law
a line drawn from the Sun to any planet will sweep out equal areas at equal times
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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
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Flashcard (89)