Chapter 8 Rotational Motion
... Example: The Moment of Inertial Depends on Where the Axis Is. Two particles each have mass and are fixed at the ends of a thin rigid rod. The length of the rod is L. Find the moment of inertia when this object rotates relative to an axis that is perpendicular to the rod at (a) one end and (b) the ce ...
... Example: The Moment of Inertial Depends on Where the Axis Is. Two particles each have mass and are fixed at the ends of a thin rigid rod. The length of the rod is L. Find the moment of inertia when this object rotates relative to an axis that is perpendicular to the rod at (a) one end and (b) the ce ...
Introduction to Forces- Reading 3: Balanced
... Once we understand the notation we will use for describing forces, we are ready to deal with a much more important idea than forces alone. Where motion is concerned, any single force acting on an object typically tells you very little, unless there is only one force acting on the object. Most of the ...
... Once we understand the notation we will use for describing forces, we are ready to deal with a much more important idea than forces alone. Where motion is concerned, any single force acting on an object typically tells you very little, unless there is only one force acting on the object. Most of the ...
Circular Motion
... frame of reference of the whirling can, both centripetal force and centrifugal force act on the ladybug. However, centrifugal force is an effect of rotation. It is not part of an interaction so it cannot be a true force. ...
... frame of reference of the whirling can, both centripetal force and centrifugal force act on the ladybug. However, centrifugal force is an effect of rotation. It is not part of an interaction so it cannot be a true force. ...
Static Electricity Ideas
... Much like the concept of an invisible Gravitational Field, there exists an invisible electric field around any charged object. The Electric field is defined as the Force that another charged object (test charge) would feel in the presence of the source charged object divided by the amount of the cha ...
... Much like the concept of an invisible Gravitational Field, there exists an invisible electric field around any charged object. The Electric field is defined as the Force that another charged object (test charge) would feel in the presence of the source charged object divided by the amount of the cha ...
Free fall
In Newtonian physics, free fall is any motion of a body where its weight is the only force acting upon it. In the context of general relativity, where gravitation is reduced to a space-time curvature, a body in free fall has no force acting on it and it moves along a geodesic. The present article only concerns itself with free fall in the Newtonian domain.An object in the technical sense of free fall may not necessarily be falling down in the usual sense of the term. An object moving upwards would not normally be considered to be falling, but if it is subject to the force of gravity only, it is said to be in free fall. The moon is thus in free fall.In a uniform gravitational field, in the absence of any other forces, gravitation acts on each part of the body equally and this is weightlessness, a condition that also occurs when the gravitational field is zero (such as when far away from any gravitating body). A body in free fall experiences ""0 g"".The term ""free fall"" is often used more loosely than in the strict sense defined above. Thus, falling through an atmosphere without a deployed parachute, or lifting device, is also often referred to as free fall. The aerodynamic drag forces in such situations prevent them from producing full weightlessness, and thus a skydiver's ""free fall"" after reaching terminal velocity produces the sensation of the body's weight being supported on a cushion of air.