(a) Define force and its various types. What is its unit ?
(b) What do you mean by conservation of momentum ?
(c) What change will a force bring in a body ?
(d) Why do passengers tend to fall back when it starts suddenly ?
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force is any interaction that, when unopposed, will change the motion of an object. ... Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity. It is measured in the SI unit of newtons and represented by the symbol F.
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