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# Science

### Science(Force)

QuestionAnswer
What is force? What cause a stationary to move
What types of force are there? Force of gravity,magnetic force, electric force and force of friction
What is friction? A force that opposes the sliding motion of an object when in contact with another object
Give an advantage of friction When a bike stops when you pull the brake
Give a disadvantage of friction Friction causes the wearing of moving surfaces in contact
What is Lubrication? Lubrication is used to reduce the friction between to surfaces in contact
Give three characteristics of wieght It is a force,it is measure in newtons and the weight of an object can change
Give three characteristics of mass It is measure in grams or kilograms,it does not have a direction and the mass of an object remains constant
What is the equation to covert mass into weight? Weight(in Newtons) = mass in kilograms x 10
What is Hooke's law? It states that the extension of an elastic body(a spring) is directly proportional to the force causing the extension
Created by: Chimozukee