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Aug 13, 2014 at 18:21 vote accept Freddy
Aug 11, 2014 at 12:39 comment added John Alexiou Its all about learning through exploration that leads to understanding.
Aug 11, 2014 at 4:24 comment added Freddy My teacher showed a small derivation with free body diagram and derived that coefficient of static friction is equal to $\tan\theta$ so whenever $\tan\theta\le$coefficient of static friction we can park a vehicle on a slope!
Aug 10, 2014 at 15:49 history answered John Alexiou CC BY-SA 3.0