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مشاهدة النسخة كاملة : Seven Questions about : Motion



Shadow of moon
03-16-2010, 04:08 PM
السلام عليكم ..
هذي مجموعة من الأسئلة حول الحركة في الفيزياء ..
شاركونا في حلّها :



(1)
A rock is dropped into a well and a splash is heard 3 s later. If sound travels in air 344 m s-1, how deep is the well


(2)
A sled starting from rest slides down a hill with uniform acceleration. It travels 12 m in the first 4 s. When will the sled have a velocity of 4 m s-1



(3)
A vector has an x component of –10 and a y component of +3.
(a) Draw a set of x-y axes and show the vector.
(b) Calculate the magnitude and direction of the vector


(4)
A = 2x + 3y. Find the magnitude and direction of (a) A; (b) –A


(5)
A and B are two vectors where A = 4x^ + 3y^ and B = 3x^ + 4y^ find C=A+2B


(6)
A ship sets out to sail 100 km north but is blown by a severe storm to a point 200 km east of
its starting point. How far must it sail, and in what direction, to reach its intended
destination.


(7)
One person walks northeast at 3 km h-1, and another heads south at 4 km h-1. How far apart
are they after 2h

Shadow of moon
03-16-2010, 06:48 PM
اخوتي أجوبة الأسئلة محتاجتهم واتمنى منكم المساعدة


رحم الله والدي ووفّق كل من يجيب عليها او جزء منها ..