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Space.

Title: Space.
Category: Science & Technology / Physics
Details: Words: 2157 | Pages: 9.2 (approximately 235 words/page)


Space.

Projectile Motion *Object, moving in gravitational field, with gravity only force acting on it - moves in a parabolic shape *Measured in two independent dimensions oVertical - gravity effects oHorizontal - remains constant though-out motion *Galileo - formulas for projectile motion oS = UT - Horizontal motion oS = UT + ½ AT2 - Vertical motion Galileo analysis of Projectile motion *Trajectory of projectile makes a parabolic shape *Led him to consider reference frames *Opponent believed in idea of geocentrism - stone would be left behind …showed first 75 words of 2157 total

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showed last 75 words of 2157 total…surface at life time of 2.2us but found - lifetime is dilated to 49.2us Implications of time dilation and length contraction for space travel *Travellers will age more slowly to stationary observer *Time dilation - possible to travel to stars in one lifetime oHowever travelling at 0.999c - take 4.47 yrs to reach closest star; on return it will be 200 yrs later on earth *If speeds can be reached in excess of c (300c) possible to travel into past

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