AST201H1 Lecture 4: 2019
19 Jan 2019
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If you travelled to the center of our galaxy and back at 99. 9999% of the speed of light, you would age about 8 days, but earth would age 50 000 years. Newton"s 1st law: objects move with constant speed and direction unless acted on by an external force. Newton"s 2nd law: force = mass x acceleration. Newton"s 3rd law: if one body exerts a force on another, the other body will exert a force of equal strength but in the opposite direction.
