Electricity and Magnetism

 

9.1 RATIONALE:        

To provide an opportunity for the learner to reflect on what were done while at school and therefore it will provide a starting point of the learning expected in this module for the student.  It also provides some background readings on  some of the basic concepts needed for learning the module

1.            A body is positively charged when it has

(A)    excess electrons

(B)    excess protons

(C)    excess neutrons

(D)    equal number of protons and electrons

CURRENT ELECTRICITY STUDY

1.  SQUID:  Superconducting Quantum Interference Device

(Adapted from the Mr. Squid Manual (Star Cryotronics) by Jerry Gollub, with updates by Suzanne Amador Kane 5/2005)

We are used to thinking of quantum mechanics as a way of understanding the properties of small things:  atoms, nuclei, etc.   By contrast, the macroscopic world often follows the classical laws of Newtonian mechanics.  The reason for this classical behavior on the macroscopic scale is that the quantum phases of the complex wavefunctions of different atoms are unrelated and can vary in complex ways from moment to moment.  We say that there is no quantum phase coherence for

Physics Material

The Physics Material is used to adjust friction and bouncing effects of colliding objects.
To create a Physics Material select Assets->Create->Physics Material from the menu bar. Then drag the Physics Material from the Project View onto a Collider in the scene.

The Physics Material Inspector

Static Physics Object Type

Static objects in the Blender Game Engine do not automatically react to physics, including gravity and collisions. Even if hit by the force of a speeding 18-wheeler truck, it will remain unresponsive in terms of location, rotation, or deformation.
It will, however, give collision reactions. Objects will bounce off of Static Objects, and rotational inertia will transfer to objects capable of rotating (that is, Rigid Body Objects will spin in response, though Dynamic Objects will not).

MACHINE IN PHYSICS

 

 

INTRODUCTION:

Learners must have been introduced to machines and covered the following subtopics; Work, Energy Power, Force (effort, load), Mechanical Advantage (MA) and Velocity Ratio (VR).

Machines are devices that make work easier though not

Mousetrap Vehicles: Motion

 

by ayubu kiswag

 

Motion is typically described in terms of velocity, acceleration, displacement and time. Learn all about motion and how it applies to mousetrap powered vehicles.

Motion occurs all around us yet it is hard to describe and explain. More than 2000 years ago the Greeks try to describe motion but failed because they did not understand the concept of rate of change. Today we describe motion in terms of rates of change. We we use the term rate we are talking about changes in time.

s = d / t

KWA UFUPI HIVI NDIVYO VIPAJI VYA ENG.AYUBU KISWAGA MWANAFUNZI ANAEJITUMA KATIKA KAZI MBALIMBALI,HEBU CLICK HAPA UJIONEE MWENYEWE(USIPITWE)

 Ayubu kiswaga akiwa field mwaka wa tatu shule ya secondary ya

Mechanics and Motion

Motion is one of the key topics in physics. Everything in the universe moves. It might only be a small amount of movement and very very slow, but movement does happen. Don't forget

Newton's Laws - Lesson 1 - Newton's First Law of Motion

State of Motion

Inertia is the tendency of an object to resist changes in its state of motion. But what is meant by the phrase state of motion? The state of motion of an object is defined by its velocity - the speed with a direction. Thus, inertia could be redefined as follows:

Inertia: tendency of an object to resist changes in its velocity.

Discussion the spectrum of mechanics

The general study of the relationships between motion, forces, and energy is called mechanics. It is a large field and its study is essential to the understanding of physics, which is why these chapters appear first. Mechanics can be divided into sub-disciplines by combining and recombining its different aspects. Three of these are given special names.
Motion is the action of changing location or position. The study of motion without regard to the forces or energies that may be involved is called kinematics. It is the simplest branch of mechanics. The branch of mechanics that deals with both motion and forces together is called dynamics and the study of forces in the absence of changes in motion or energy is called statics.

Motion (physics)

From Wikipedia, the free encyclopedia

In physics, motion is a change in position of an object with respect to time and its reference point.

Problems

A box of mass 5.0 kg is pulled vertically upwards by a force of 68 N applied to a rope attached to the box. Find a) the acceleration of the box and b) the vertical velocity of the box after 2 seconds.
Solution:

Experimental facts about friction

1.

f_sN where is the coefficient of static friction and N is the magnitude of the normal force. Equality holds when the object is on the point of slipping: f_s(max) = N .

Newton's First Law

Newton's First Law States: an object at rest stays at rest, an object in motion stays in motion with a

Newton's Second Law

If 0 (i.e. there is a net external force acting on an object) then,
 

= m.

(2)

Definition: Inertia is the tendancy of an object to resist any attempt to change its state of motion.

Newton's Third Law

Idea: Forces in nature always exist in pairs. Newton's third law states: For every action, there is an equal and opposite reaction. When two bodies interact:

= - .

(4)

Where is the force exerted on body 1 by body 2 and is the force exerted on body 2

Applications of Newton's Laws

Assumptions:

• We treat objects as point

Friction

Friction originates from forces between atoms and molecules when surfaces are in contact. For example, friction occurs when a body moves on a rough surface or through a fluid medium (water, air, etc.). There are two types of friction:

1.

The Static force of friction ( f_s ) is the force of friction between two objects when there is no motion.

Science Notes: Measuring Matter, Force, and Energy

Matter, force, and energy are common terms that have scientific meanings close to the common use of the words. Matter is the stuff of which everything is composed, and force is something that is capable of changing the motion of an object. Energy is a property that tells us how much work we can get out of the object that possesses that energy. In keeping with the fact that science is based on measurements and observations, all of these entities are