Physics time

CONCEPT OF WORK:  In physics , work is said to be done whenever a force moves it point of application a distance in the direction of the force. Work is done whenever a force is applied in order to cause a body to move . For instance , if a boy push a car a certain distance or lift a load from one point to another or his stretched or compress an elastic body some distance , work is said to be done by the boy.      Mathematically , W= F x S Work done = force x perpendicular distance  Where W = work done , F = force , S = distance covered by the body . Work done is defined as the product of the force and the displacement in the direction of the applied force . It is measured in joules. WORK DONE IN A FORCE FIELD: What is force field ?  There are two types of forces namely : 1. Contact forces   2. Force fields . Contact forces are forces which are encountered or in touch with the body to which they are applied . Examples are forces of push , pull , te...

 Cholera is a seasonal disease which occurs mostly during rainy season and more often in areas with poor sanitation. HOW CHOLERA CAN BE TRANSMITTED Cholera can be transmitted in the in the following ways: 1. Through the infected stool of one person, enter the mouth of another via ingestion of contaminated food or water . SYMPTOMS  A lot of watery diarrhea, vomiting, rapid dehydration, muscle cramps and in severe cases, leads to death . HOW TO PREVENT CHOLERA: 1.Ensure water is boiled, chlorinated or bottled. 2. Avoid ice made from untreated water . 3.Ensure safe disposal of faces . 4. Avoid open defecation. 5. Wash hands with soap and Clean water regularly. 6. Wash your hands before and after eating. 7. Wash your hands after using the toilet. 8. Eat well-cooked food , avoid raw or undercooked sea food and peel fruits and vegetables. Be cautious with street foods .        Remember , there is cholera outbreak currently in Nigeria. Do well to report any suspec...