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#### Newton’s Laws Saturn There are science laws or rules that determine how objects move. Three of these are called Newton's Laws. Sir Isaac Newton was a physicist. Physics is a branch of science that deals with how objects move. Newton's First Law states that a body in motion tends to stay in motion unless affected by another force. Newton's Second Law defines what a force is in mathematical terms: Force = Mass x Acceleration. Newton's Third Law states that for every action there is an equal and opposite reaction. Check that you understand what these words mean in this document To determine: to decide upon or fix definitely. To deal with: to have as an object of study. To affect: to have an effect upon. For further reading visit: Newton’s Laws