day05workek - 1 2 mv 1 2 = E k 2 E k 1 W = E E k = 1 2 mv 2...

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Work Work done by a force on an object = that force x the distance the object moves x cosine of the angle between the force and displacement. = ( [W] = N.m = J (Joule) J = kg m 2 / s 2 W = 0 if ( The earth does no work on the moon as it orbits because ) k W Therefore, (Work-Energy theorem) A:\sph4u1\chap4-5\day05workek.doc ± = 90 o = F A d = m a d = m v 2 2 v 1 2 2 d d W F d cos ± , a s c a l a r c a n b e n e g a t i v e ) F g z ² d = 1 2 mv 2 2
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Unformatted text preview: 1 2 mv 1 2 = E k 2 E k 1 W = E E k = 1 2 mv 2 = p 2 2 m or p = 2 mE k W Kinetic Energy/ Momentum Relationship NOTE: Work & E g = F d ( because = o ) a = ( = = = ) F F 0 & a F h if v v ; a g v a g 2 1 = m g h = E g Graphically The area under a F A vs d graph equals work done & also the energy change....
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day05workek - 1 2 mv 1 2 = E k 2 E k 1 W = E E k = 1 2 mv 2...

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