File - Introducation
... Any excess charge on an isolated conductor resides entirely on its surface The electric field just outside a charged conductor is perpendicular to the conductor’s surface On an irregularly shaped conductor, the charge accumulates at locations where the radius of curvature of the surface is smallest ...
... Any excess charge on an isolated conductor resides entirely on its surface The electric field just outside a charged conductor is perpendicular to the conductor’s surface On an irregularly shaped conductor, the charge accumulates at locations where the radius of curvature of the surface is smallest ...
Chapter 27
... Magnetic Forces We know that a single moving charge experiences a force when it moves in a magnetic field What is the net effect if we have multiple charges moving together, as a current in a wire? We start with a wire of length l and cross section area A in a magnetic field of strength B with the ...
... Magnetic Forces We know that a single moving charge experiences a force when it moves in a magnetic field What is the net effect if we have multiple charges moving together, as a current in a wire? We start with a wire of length l and cross section area A in a magnetic field of strength B with the ...
q - MACscience
... it’s Lewis’ turn to push. Cameron and Chris decide to climb into the centre of the roundabout instead of sitting on the seats at the outside. This reduces the inertia of the roundabout + friends to 7000kgm2. ► If Lewis pushes with the same force of 120N for 25s, what will the final angular speed of ...
... it’s Lewis’ turn to push. Cameron and Chris decide to climb into the centre of the roundabout instead of sitting on the seats at the outside. This reduces the inertia of the roundabout + friends to 7000kgm2. ► If Lewis pushes with the same force of 120N for 25s, what will the final angular speed of ...
AP® Physics C 1996 Free response Questions The materials
... The rod is now glued to a thin hoop of mass M and radius R/2 to form a rigid assembly, as shown above. The centers of the rod and the hoop coincide at point P. The assembly is mounted on a horizontal axle through point P and perpendicular to the page. b. What is the rotational inertia of the rod-hoo ...
... The rod is now glued to a thin hoop of mass M and radius R/2 to form a rigid assembly, as shown above. The centers of the rod and the hoop coincide at point P. The assembly is mounted on a horizontal axle through point P and perpendicular to the page. b. What is the rotational inertia of the rod-hoo ...
Document
... to the sum of the moments of its components about the same point. Consider the Force, F with two components: F = F1 + F2. Using the distributive law of vectors ( see section 3.3.3) Mo = r x F1 + r x F2 = r x (F1 + F2) = r x F ...
... to the sum of the moments of its components about the same point. Consider the Force, F with two components: F = F1 + F2. Using the distributive law of vectors ( see section 3.3.3) Mo = r x F1 + r x F2 = r x (F1 + F2) = r x F ...
Weightlessness
Weightlessness, or an absence of 'weight', is an absence of stress and strain resulting from externally applied mechanical contact-forces, typically normal forces from floors, seats, beds, scales, and the like. Counterintuitively, a uniform gravitational field does not by itself cause stress or strain, and a body in free fall in such an environment experiences no g-force acceleration and feels weightless. This is also termed ""zero-g"" where the term is more correctly understood as meaning ""zero g-force.""When bodies are acted upon by non-gravitational forces, as in a centrifuge, a rotating space station, or within a space ship with rockets firing, a sensation of weight is produced, as the contact forces from the moving structure act to overcome the body's inertia. In such cases, a sensation of weight, in the sense of a state of stress can occur, even if the gravitational field was zero. In such cases, g-forces are felt, and bodies are not weightless.When the gravitational field is non-uniform, a body in free fall suffers tidal effects and is not stress-free. Near a black hole, such tidal effects can be very strong. In the case of the Earth, the effects are minor, especially on objects of relatively small dimension (such as the human body or a spacecraft) and the overall sensation of weightlessness in these cases is preserved. This condition is known as microgravity and it prevails in orbiting spacecraft.