LEARNING-CARE CENTRE: Educational materials for science students in Senior Secondary School

FIRST TERM : WEEK 5 TOPIC: SCALAR AND VECTOR QUANTITIES SCALAR QUANTITIES:  They are quantities that have only magnitude (size) but no direction. Example: length, time, speed, temperature, energy etc. note that all fundamental quantities are scalar quantities VECTOR QUANTITIES: These are those which have both magnitude (size) and direction. Example are displacement, velocity, Acceleration, weight, force, momentum, electric Field. Note that all derived quantities are vector quantities. POSITION The position of an object in space or on a plane is the point at which the object can be located with reference to a given point, 0.  Position can be located using (x,y) or (x,y,z) Cartesians co-ordinate system i.e. locating two or more points or using bearing. When writing the co-ordinate of points, x is written first followed by y. Example Locate the following position on the  Cartesian plane: (a)  M   (2, 1.5);        ...

FIRST TERM: WEEK 4 TOPIC: FRICTIONAL FORCE Friction  is defined as a force which acts at the surface of separation between two objects in contact and tends to oppose the motion of one over the other. Laws of solid frictions 1.        Friction opposes the relative motion between two surfaces in contact. It acts in a direction opposite to that of the motion. 2.        The force of friction increases to the same extent as the force which tends to start the motion. 3.        Frictional force depends on the nature of the two surfaces in contact. 4.        It is independent of the area of the surface in contact. 5.        It varies directly with the normal force pressing the surface together i.e it is proportional to the normal reaction R. STATIC AND DYNAMIC FRICTION https://www.blogger.com/img/img-grey-rectangle.png ...