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Innumerable examples might be given of the necessity of true theory in the economical designing of all kinds of machinery; but probably there is nothing that better proves how much mathematical ...
Learn about and revise free body diagrams, resolving forces, Newton's laws and stopping distances with GCSE Bitesize Combined Science.
Vector diagrams Draw a right-angled triangle to scale, in which each side represents a force. Try to choose a simple scale, for example 1 cm = 1 N. For the toy trailer example above, draw: ...