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Uniform Circular Motion Uniform circular motion can be described as the motion of an object in a circle at a constant speed. As an object moves in a circle, it is constantly changing its direction. In all instances, the object is moving tangent to the circle. Since the direction of the velocity vector is the same as the direction of the object's motion, the velocity vector is directed tangent to the circle as well. The animation at the right depicts this by means of a vector arrow. An object moving in a circle is accelerating. Accelerating objects are objects which are changing their velocity - either the speed (i.e., magnitude of the velocity vector) or the direc
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submitted by master_purav (1343 m) on 9 Sep 2007 15:05:39 IST (5 comments 210 views)
In physics, circular motion is rotation along a circle: A circular path or a circular orbit. The rotation around a fixed axis of a three-dimensional body involves circular motion of its parts. We can talk about circular motion of an object if we ignore its size, so that we have the motion of a point mass in a plane. Examples of circular motion are: an artificial satellite orbiting the Earth in geosynchronous orbit, a stone which is tied to a rope and is being swung in circles (cf. hammer throw), a racecar turning through a curve in a racetrack, an electron moving perpendicular to a uniform magnetic field, a gear turning inside a mechanism. A special kind of
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submitted by anshulpatel (108 m) on 20 Sep 2007 15:26:28 IST (6 comments 214 views)
Circular Motion Motion that repeat itself is called periodic motion. A projectile motion, since it doesn't repeat, is not periodic. The motion of a swinging ball is an example of circular motion. Let's analyze the circular motion. Consider a planet around the Sun. When there is no external force, an object will travel in a straight line (Newton's First Law of Motion). In order for an object to travel in a circle, there has to be a force that makes it travel in a circle. An object in circular motion always tries to move in a straight line (Law of Inertia). However, there is a force that acts toward the center of the motion. This force
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submitted by aditya.thakar (315 m) on 27 Aug 2007 23:15:44 IST (6 comments 122 views)
Problem 1 The figure shows the plot of angular displacement and time of a rotating disc. The magnitude of angular velocity is minimum for motion in : Angular displacement and time plot (a) segment OA (b) segment AB (c) segment BC (d) segment CD Answer The magnitude of slope of line CD is zero. The magnitude of slope of line AC is finite and is greater than that of line OA. Hence, option (d) is correct. Problem 2 The figure shows the plot of angular displacement and time of a rotating disc. Corresponding to the segments marked on the plot, the direction of rotation is as :
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submitted by magiclko (4210 m) on 17 Apr 2007 22:44:23 IST (2 comments 250 views)
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