اريد حل هذه المسأله

[FUTURE_MAN90]

راكب دراجة بخارية ينطلق نحو الشمال بسرعة 80 كم/س بينما تهب الرياح في اتجاه الغرب بسرعة 50 كم / س احسب سرعة الرياح الظاهرية كما يلاحظها راكب الدراجه ؟؟؟

[فتحي مكي]

ببساطة اذا اخترنا نظام احداثيات بحيث يكون الشمال هو y و الغرب هو -x نوجد المحصلة ببساطة من قانون فيثاغورث فتكون بحدود 90.434 كم/س والله اعلم

[FUTURE_MAN90]

نعم وهذا ما كنت افكر به..........لكن هل يوجد قانون او تعريف للسرعه الظاهريه؟؟؟؟
وشكرا أخى فتحى

[فتحي مكي]

السرعه الظاهريه هي السرعة النسبية اي كما في مثالك يقصد سرعة الرياح كما يقيسها الشخص الذي يركب الدراجة بينما تكون سرعة الرياح بالنسبة لشخص يقف ثابتا على سطح الارض تساوي 50 كم \ س

[myy]

burberry outlet online (http://www.outletburberrybags.com/), barbour (http://www.barbour.in.net/), oakley sunglasses (http://www.oakleys-sunglasses.com.co/), soccer jerseys (http://www.soccershoes.us.com/), nike free trainer 5.0 (http://www.nikefree5.net/), polo ralph lauren outlet online (http://www.ralph-laurenpolosoutlet.com/), louboutin (http://www.louboutin.jp.net/), coach outlet store (http://www.coachsoutletonline.in.net/), nike roshe run (http://www.rosheruns.us/), omega (http://www.omegas-relojes.es/), pandora jewelry (http://www.pandoracharms-canada.ca/), giuseppe zanotti sneakers (http://www.giuseppezanotti.com.co/), ralph lauren factory store (http://www.ralph-laurenoutletonline.com/), hornets jersey (http://hornets.nba-jersey.com/), michael kors bags (http://www.mk-outletonline.us/), michael kors (http://www.michael-kors-australia.com.au/), ray ban (http://www.raybans-outlet.nl/), versace (http://www.versace-outlet.com/), nike roshe run (http://www.roshe-runs.co.uk/), rolex watch (http://www.rolex-watches.us.com/), ralph lauren outlet (http://www.polo-ralphlaurens.us.com/), polo outlet online (http://www.polos-outlets.com/), lakers jersey (http://lakers.nba-jersey.com/), longchamp black friday (http://longchamp.blackofriday.com/), new orleans pelicans jerseys (http://pelicans.nba-jersey.com/), ferragamo shoes (http://www.ferragamo.net.co/), nike shoes (http://www.nike-shoescanada.ca/), northface (http://www.north-face.com.co/), true religion jeans outlet (http://www.true-religions.com/), ralph lauren outlet (http://www.ralph-laurens.org.uk/), new balance (http://www.new-balanceshoes.es/), the north face outlet (http://www.the-northfaces.org.uk/), jimmy choo outlet (http://www.jimmy-choosshoes.com/), asics gel (http://www.asicsoutlet.com.co/), timberland outlet (http://www.timberlandbootsoutlet.us.com/), north face backpacks (http://www.thenorth-face.com.co/), hugo boss (http://www.hugo-boss.com.co/), marc jacobs handbags (http://www.marc-jacobs.us.com/), oakley pas cher (http://www.oakley-outlet.fr/), nike shoes (http://www.nikestoreoutlet.us/), swarovski (http://www.swarovski-australia.com.au/), burberry outlet online (http://www.burberry-outlets.net.co/), veneta (http://www.bottega-venetasoutlet.com/), oakley outlet online (http://www.oakley-outletonline.com.co/), burberry sale (http://www.burberry-handbags.net.co/), michael kors (http://www.michael-korsoutlet.co.uk/), ray ban sunglasses outlet (http://www.raybans-outlet.org.uk/), ferragamo (http://www.salvatore-ferragamos.com/), nike running shoes (http://www.nikefree-runs.org.uk/), reebok (http://www.reeboks.com.de/), salvatore ferragamo (http://www.ferragamoshoes.in.net/), true religion (http://www.truereligions.net/), doudoune north face (http://www.northfacejackets.fr/), jerseys from china (http://www.nfl-jersey.us.org/), polo ralph (http://www.polos-ralphlauren.com.co/), mlb jerseys (http://www.cheap-mlbjerseys.us.com/), celtics jerseys (http://celtics.nba-jersey.com/), hollister online shop (http://www.hollisteronlineshop.com.de/), omega watches (http://www.omega-watches.com.co/),