Summary A unit vector    is the vector whose magnitude is 1 unit. It is used to specify the direction of the given vector. Unit vector is defined as:  Magnitude of a vector is:  A vector can be further broken down or resolved into its two components: vertical and horizontal. Vertical component is defined as  … Read more

Elastic Strings

Summary An elastic string is one that can be stretched and it will return back to its original length. Hooke’s Law basically states that within the elastic limits, extension is proportional to the tensile force. It is defined as:    where    is the modulus of the string, T is the tensile force, e is … Read more


Summary When a body is suspended, the centre of mass is always positioned vertically below the point of suspension and this result is used to determine the angle of suspension. There are always two forces acting on that object when the object stands on a surface: 1.    Weight W 2.    The resultant of all the … Read more


Summary Projectile motion is basically the motion of an object that is moving in the air and experiences a gravitational force. The two types of projectile motions are; Horizontally launched projectiles & Non Horizontally launched projectiles. Important Kinematic Equations are: Where v = final velocity, u = initial velocity, g = acceleration due to  , … Read more

Using Newton’s Law

Summary We have already studied Newton’s Three Laws of Motion in our previous article. In this article we discuss how these laws are used. Recall F = ma from Newton’s Second Law of motion where F is the Force on the moving body, mis the mass and ais the acceleration of the moving body. When … Read more

Newton’s Laws of Motion

Summary Newton’s First Law of Motion: Every body continues in a state of rest or if uniform motion in a straight line unless it is acted upon by an external force and is compelled to change its state. Newton’s Second Law of Motion: The rate of change of momentum of a body is directly proportional … Read more