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Topic: Centripetal force

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	centripetal force and centrifugal force — FactMonster.com
		The centrifugal force acts on the source of the centripetal force to displace it radially from the center of the path.
		Thus, in twirling a mass on a string, the centripetal force transmitted by the string pulls in on the mass to keep it in its circular path, while the centrifugal force transmitted by the string pulls outward on its point of attachment at the center of the path.
		The centrifugal force is often mistakenly thought to cause a body to fly out of its circular path when it is released; rather, it is the removal of the centripetal force that allows the body to travel in a straight line as required by Newton's first law.
	www.factmonster.com /ce6/sci/A0811114.html (380 words)

	Centripetal Force - MSN Encarta
		Centripetal Force, a centre-seeking force that causes an object to move in a circular path.
		It is often thought that a centrifugal force acts on the object moving in a curved path, tending to pull it outward, away from the centre, and that this balances the centripetal force pulling it inward.
		If the centripetal force were suddenly to be removed (again gravity is ignored), the object would not accelerate but move in a tangential straight line—proving that no other force is acting on the object.
	uk.encarta.msn.com /encyclopedia_761579565/Centripetal_Force.html (581 words)

	Centripetal Force
		The centripetal acceleration can be derived for the case of circular motion since the curved path at any point can be extended to a circle.
		Note that the centripetal force is proportional to the square of the velocity, implying that a doubling of speed will require four times the centripetal force to keep the motion in a circle.
		The centripetal acceleration expression is obtained from analysis of constant speed circular motion by the use of similar triangles.
	hyperphysics.phy-astr.gsu.edu /hbase/cf.html (267 words)

	Teachers' Domain: Defy Gravity! Centripetal Force
		Centripetal force is the force that pushes or pulls an object inward so that it will move in a circular path.
		In this case, the force is produced by the friction between the tires and the pavement.
		Centripetal force acts on the ball as it rolls around inside the pitcher, putting the ball in position to be supported by the pitcher's curved surface, which is what really keeps it from falling out.
	www.teachersdomain.org /resources/phy03/sci/phys/mfw/zcentrip/index.html (651 words)

	Centripetal Force
		This force is directed towards the center of the circular path and is called a centripetal force.
		This allows you to determine the centripetal force which was present when you were rotating the bob.
		Using the radius setting and one of the spring/extender combinations (preferable one that gives a centripetal force near the middle of the force range) from Part A, change the mass of the bob using slotted weights and find the dependence of the angular velocity on the mass.
	people.scs.fsu.edu /~dduke/manual/centripetal.htm (1679 words)

	PowerPedia:Centrifugal force - PESWiki
		Generally, a centrifugal force is a force that pushes in a direction that is away from the center of a circular path.
		This is equal in magnitude to the centripetal force, directed away from the center of rotation, and is exerted by the rotating object upon the object which exerts the centripetal force.
		Such potential energy of the centrifugal force is often used in the calculation of the height of the tides on the Earth (where the centrifugal force is included to account for the rotation of the Earth around the Earth-Moon center of mass).
	peswiki.com /index.php/PowerPedia:Centrifugal_force (2252 words)

	PowerPedia:Centripetal force - PESWiki
		The centripetal force is the force needed to move an object in a circle at constant speed.
		For an orbiting satellite, the centripetal force is supplied by the gravitational attraction between the satellite and its primary, and acts toward the center of mass which lies in the satellite's primary.
		Centripetal Force (http://hyperphysics.phy-astr.gsu.edu/HBASE/cf.html): Note that the centripetal force is proportional to the square of the velocity, implying that a doubling of speed will require four times the centripetal force.
	www.peswiki.com /index.php/PowerPedia:Centripetal_force (1174 words)

	centripetal - definition by dict.die.net
		centripetal adj 1: tending to move toward a center; "centripetal force" [ant: centrifugal] 2: tending to unify [syn: unifying] 3: of a nerve fiber or impulse originating outside and passing toward the central nervous system; "sensory neurons" [syn: receptive, sensory]
		Centripetal force (Mech.), a force whose direction is towards a center, as in case of a planet revolving round the sun, the center of the system, See Centrifugal force, under Centrifugal.
		Centripetal impression (Physiol.), an impression (sensory) transmitted by an afferent nerve from the exterior of the body inwards, to the central organ.
	dict.die.net /centripetal (152 words)

	CENTRIPETAL FORCE
		Your challenge for this laboratory period will be to design and execute an experiment that will demonstrate that the net force exerted on a mass moving in a circular path is the same as the force necessary to extend the spring.
		Force can be added to the spring of the removed apparatus to extend the spring to the distance of equilibrium when the apparatus is in rotation.
		Then the calculated centripetal force can be compared with the force necessary to extend the spring.
	www.iun.edu /~cpalw/pweb/centfor/centfor.htm (549 words)

	Activity: Orbital Forces (Site not responding. Last check: )
		To demonstrate orbital motions and forces using a tennis ball swung by a ribbon.
		A center-directed force that causes an object to follow a circular path is called a centripetal force.
		In this activity, the centripetal force on the ball is produced by ribbon tension.
	www.spacegrant.hawaii.edu /class_acts/Orbits.html (194 words)

	Centripetal Force (experiment)
		The centripetal force of an object is determined by Newton's Second Law of Motion: The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma.
		Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector.
		Centripetal force is a force that is directed toward the center of a circular path.
	www.themosh.org /psd2003/projects/centripetal.asp (213 words)

	Centripetal Force
		Force is always in the direction of acceleration, and therefore the force is directed toward the center of the circle.
		Now that we have established the existence of a force in rotational motion, it is possible to give it a name: centripetal force, or the force that causes an object in uniform circular motion to move toward the center of the circular path.
		On the other hand, the acceleration and centripetal force generated on a roller coaster are high, conveying a sense of weightlessness (and sometimes the opposite of weightlessness) that is memorable indeed.
	www.scienceclarified.com /everyday/Real-Life-Chemistry-Vol-3/Centripetal-Force.html (3398 words)

	centripetal force and centrifugal force. The Columbia Encyclopedia, Sixth Edition. 2001-05
		For a planet orbiting the sun, the force is gravitational; for an object twirled on a string, the force is mechanical; for an electron orbiting an atom, it is electrical.
		The centrifugal force acts on the source of the centripetal force to displace it radially from the center of the path.
		The centrifugal force is often mistakenly thought to cause a body to fly out of its circular path when it is released; rather, it is the removal of the centripetal force that allows the body to travel in a straight line as required by Newton’s first law.
	www.bartleby.com /65/ce/centripe.html (384 words)

	Centripetal Force (Site not responding. Last check: )
		However, I don't believe that matching clubs by centripetal force is likely to result in a set of clubs that feel the same or swing the same.
		The centripetal force is equal to the first moment of the club times some number which is a characteristic of the golfer.
		And centripetal matching is the latter; moreover, it's a pretty extreme case of the latter.
	www.tutelman.com /golfclubs/CentripetalForce.php (5417 words)

	* Centripetal force - (Astronomy): Definition
		Centripetal force is a force that acts upon a body moving in a curved path.
		This force is directed towards the center of the curvature of the path.
		This happens because at those five points, the gravitational force of the large objects is exactly equal to the centripetal force required to rotate with the objects.
	en.mimi.hu /astronomy/centripetal_force.html (227 words)

	Centripetal force - Definition, explanation
		The centripetal force is the force pulling an object toward the center of a circular path as the object goes around the circle.
		In the case of an orbiting satellite the centripetal force is its weight and acts towards the satellite's primary; in the case of an object at the end of a rope, the centripetal force is the tension of the rope and acts towards whatever the rope is anchored to.
		In this case, the centripetal force appears to be exactly cancelled by a pseudo-force, the centrifugal force.
	www.calsky.com /lexikon/en/txt/c/ce/centripetal_force.php (590 words)

	Centripetal Force
		This force is directed towards the center of the circular path and is called a centripetal force.
		This allows you to determine the centripetal force which was present when you were rotating the bob.
		Using the radius setting and one of the spring/extender combinations (preferable one that gives a centripetal force near the middle of the force range) from Part A, change the mass of the bob using slotted weights and find the dependence of the angular velocity on the mass.
	www.csit.fsu.edu /~dduke/manual/centripetal.htm (1679 words)

	Centripetal Force
		Calculate the centripetal force from the data of procedure part C. This is a direct determination because the centripetal force is simply the total weight that is takes to stretch the spring to the same length that it had whole rotating.
		A student is trying to solve a physics problem by drawing a force diagram (or a free-body diagram) for an object that is moving in a circular path.
		He decides to draw all the forces acting on the object, including the centripetal force, and then he applies Newton's 2nd law, i.e., he vectorially adds up all the forces (including the centripetal force) and sets this sum equal to the object's mass times its acceleration.
	physics.nku.edu /GeneralLab/211%20Centripetal%20Force.html (568 words)

	Centripetal Force (Site not responding. Last check: )
		This force is directed toward the centre of the circle, so it is called a "centripetal force".
		The post and the mass are joined by a spring (s), which exerts the centripetal force that keeps the mass moving in a circle.
		Once the spring has been stretched far enough for M to touch the post again, the force exerted by the spring is mg, the weight of the masses dangling from the pulley.
	www.ap.stmarys.ca /demos/content/mechanics/centripetal_force/centripetal_force.html (292 words)

	Experiment 13 Centripetal Force
		The centripetal force apparatus is such that the restoring force exerted by the spring on the rotating mass is proportional to the number of turns of the collar which determines the position of the fixed end of the spring.
		is the force in the spring for the initial setting of the collar, and k is a constant corresponding to the change in the spring force per turn of the collar.
		2) Making sure the centripetal force apparatus is securely clamped in the chuck of the rotator, gradually increase the speed of rotation until the pointer is deflected up to the index mark.
	www.oglethorpe.edu /faculty/~m_rulison/IntroPhysLab/Lab_Descriptions/experiment__13_centripetal_force.htm (473 words)

	Centripetal Force (Site not responding. Last check: )
		And if the unbalanced force (blue arrow) is applied perpendicular to the motion of the object there will be a change in the direction.
		Since the force has to be constant for the object to move in a circular path the object is always being accelerated.
		Centripetal force, like the centripetal acceleration, is also always directed towards the center.
	library.thinkquest.org /2745/data/centrip1.htm (190 words)

	[No title]
		The centripetal force is, by definition, the radial component of the net force acting on the body.
		The "measured centripetal force" labels the values obtained by direct static measurement of the force required to extend the spring to that radius.
		That relation tells us that the centripetal force is proportional to the mass and to the radius and proportional to the square of the frequency.
	www.lhup.edu /~dsimanek/scenario/labman1/centrip.htm (2647 words)

	P30 Centripetal Force Pendulum
		The purpose of this laboratory activity is to measure the centripetal force exerted on a pendulum bob directly using the force sensor and to compare the measured force to the calculated force based on the speed of the pendulum.
		At the bottom of the pendulum's swing the net force on the bob is the combination of the tension in the string and the force of gravity.
		Thus the force measured by the force sensor when the pendulum is in motion is equal to the centripetal force Fc as the pendulum bob passes through the lowest point of the swing.
	www.usd.edu /phys/labs/Mechanics/P30/P30.html (1265 words)

	CENTRIPETAL FORCE AND ACCELERATION
		The radial force needed to create this acceleration is call the centripetal force.
		For any object undergoing uniform circular motion, the net force towards the center of rotation must have a value equal the centripetal force.
		In this rotating frame, the centripetal force is replaced with a force of the same magnitude acting outwards, which is called the centrifugal force.
	www.ac.wwu.edu /~vawter/PhysicsNet/Topics/RotationalKinematics/CentripetalForce.html (309 words)

	Demonstration Equipment
		Students know applying a force to an object perpendicular to the direction of its motion causes the object to change direction but not speed (e.g., Earth's gravitational force causes a satellite in a circular orbit to change direction but not speed).
		This force is directed toward the center of the circle.
		This force (centripetal force) causes a change in direction, but not a change in speed.
	www.csun.edu /~ckc503/centripetal.htm (523 words)

	Centripetal vs. Centrifugal Forces
		That force is defined as the CENTRIPETAL force.
		The term CENRTIFUGAL force appears to have come about because of a mistaken perception that there is a force that operates in the opposite direction as the CENTRIPETAL force.
		The "pull" that is felt by the ball on a string or by the hammer thrower is the force that has to be applied toward the center, to keep the ball from flying off tangentially, not radially.
	www.newton.dep.anl.gov /askasci/phy00/phy00305.htm (564 words)

	Centripetal Force - Pendulum Form
		One is the constant downward force of gravity, mg.
		The two forces at the bottom are co-linear, with the upward tension force T being larger than the downward weight, mg, by the required centripetal force.
		The tension force of the support string is transmitted to the force sensor by the pulley and can be recorded by the interface and cpu.
	homepage.mac.com /cbakken/weblabs/centforce.html (617 words)

	Lab 4 - Centripetal Force & Motion
		The tension in the string (which is equal to the centripetal force) is now produced by this force of gravity on the fl ball's mass.
		This force is applied by the string and is supplied by the tension due to the weight of the fl ball (which is simply the force due to gravity on the fl ball mass).
		Mg/m: Mg is the gravitational force for the fl ball and m is the mass of the red ball.
	www.sethi.org /classes/phys214/lab_notes/lab_04.html (1091 words)

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