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Science
Science(Force)
Question | Answer |
---|---|
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 |