Video narration
Itha kunta tamshi qotriyan abr malab al-madrasah, fakayfa tasif harakatak: ila al-amam faqat, am ila al-janib aydan? Wa bil-mithl, indama tataharrak al-taairah bisurat miat metr fi al-thaniyah bizawiyat sittin darajah, kam min suratih yatijih ila al-amam, wa kam yatijih ila al-ala? Al-fikrah absat mimma tabdu. Ladayna mutajih surah qotri wahid, wa yumkin wasfuh bimukawwinayn mutaamidayn: ufuqi Vx, wa rasi Vy. Hathan laysa suratayn munfasilatayn; innahuma al-wasf nafsuh lil-surah, lakin fi ittijahayn mufidayn. Wa lianna al-zawiyah maqsah min al-mahwar al-ufuqi, tuhaddid al-zawiyah nasib kull ittijah: nastakhdim cosine lil-ufuqi, wa sine lil-rasi. Idhan: Vx = V cos theta Vx = 100 cos 60 degrees = 50 m/s. Amma al-mukawwinah al-rasiyah, allati tasif al-harakah ila al-ala fi al-namudhaj, fanastakhdim: Vy = V sin theta Vy = 100 sin 60 degrees approx 86.6 m/s. Idhan, jawab al-sual: tataharrak al-taairah ila al-amam bisurat 50 m/s, wa ila al-ala bisurat tuqarib 86.6 m/s. Wa al-mukawwinan maaan yumaththilan mutajih al-surah, miqdaruh 100 m/s inda zawiyat 60 darajah.