Physics KE

Introduction to Linear Motion – It is the study of motion. It is divided into two. – In kinematics, forces causing motion are disregarded while dynamics deals with motion of objects and the forces causing them. I. Displacement – Distance moved by a…

Fluid Flow: Introduction – Fluid in physics refers to liquids and gases. To study fluid flow we have to make the following assumptions: Streamline and Turbulent Flow – The path followed by a small element of a moving fluid is…

Sound: Introduction – Sound is an important example of a longitudinal wave which is composed of both compressions and rarefactions.– The frequency range in which compressional disturbances occur is called the sonic spectrum and is very large.– Compressional waves with…

Waves I: Introduction – A wave is simply a disturbance that moves through a medium. Other waves do not require a medium to travel i.e. they can travel in a vacuum, are known as electromagnetic waves e.g. radio, X-rays, gamma rays UV…

Hooke’s Law: Introduction – Hooke’s law states that the extension of a spring is proportional to the applied force, provided that the force is not large enough to deform the spring permanently.– Mathematically expressed as Force α extension. Spring Constant – Since Force…

Introduction: Oersted’s discovery – Hans Christian Oersted discovered the magnetic effect of a current in 1819.– The direction of the field is dependent on the direction of the current. Determining the Direction of the Lines of Force – The direction…

Concave and Convex Mirrors -They are also known as spherical mirrors and are formed when a spherical glass is silvered.-If the inside is silvered a convex or diverging is formed while a concave or converging mirror is formed when the outside is silvered. Parts of a Spherical Mirror…

Centre of Gravity – Centre of gravity or C.G is the point of balance of a body in which the total weight of the body seems to act. Practice Example 1 The figure below shows a uniform bar of weight…

Turning Effects: Introduction – The turning effect of a body is called the moment of that force.– The turning effect produced depends on both the size of the force and the distance from the pivot.– The moment of a force…

 Measuring Length Using Vernier Callipers -Vernier callipers is used when higher accuracy in measurement is required and this cannot be done using a metre rule.– Vernier callipers has two scales; main scale and vernier scale. Outside jaws are used to measure both…