ملتقى الفيزيائيين العرب - أنجلــــــــــــــــــــــــــــــــــش ..طلبتكم حلولي..:(

سلااااااااااااااااااااااام
أنا عندي بعض المسائل بأنجليش ماعرفت أحله :mommy_cut: عشااااان كذا ساااااااااااااااااااعدوني والله يجزكم خير دنيااااااا وأخره
هذي هي المسائل:
A SINGLE CONSERVATIVE FORCE ACTING ON A PARTICLE VARIES AS F=(-AX +BX^2)IN,WHERE A AND B ARE CONSTANTS AND X IS IN M.-4-
(A)CALCULATE THE POTENTIAL ENERGY ASSOCIATED WITH THIS FORCE ,TAKING U=0 AT X0=0
(B)FIND THE CHANGE IN POTENTIAL ENERGY AND CHANGE IN KINETIC ENERGY AS THE PARTICLE MOVES FROM X=2M TO X=3M
المسأله الثانبه:
USE CONSERVATION OF ENERGY TO DETERMINE THE FINAL SPEED OF A MASS OF 5KG ATTACHED TO ALIGHT CORD OVER A MASSLESS, FRICTIONLESS PULLEY AND ATTACHED TO ANOTHER MASS OF 3.5KG WHEN THE 5KG MASS HAS FALLEN (STARTING FROM REST) A DISTANCE OF 2.5M .
http://www.gulfup.com/up/pngfiles/bBa32904.png
المسأله الثالثه:
USE CONSERVATION OF ENERGY TO DETERMINE THE FINAL SPEED OF A MASS OF 5KG ATTACHED TO ALIGHT CORD OVER A MASSLESS, FRICTIONLESS PULLEY AND ATTACHED TO ANOTHER MASS OF 3.5KG WHEN THE 5KG MASS HAS FALLEN (STARTING FROM REST) A DISTANCE OF 2.5M .
http://www.gulfup.com/up/pngfiles/QL833008.png
المسأله الرابعه:
A BLOCK WITH A MASS OF 3KG STARTS AT A HEIGHT H=60 CM ON A PLANE WITH AN INCLINATION ANGLE OF 30 . UPON REACHING THE BOTTOM OF THE RAMP, THE BLOCK SLIDES ALONG A HORIZONTAL SURFACE . IF THE COEFFICIENT OF FRICTION ON BOTH SURFACES IS =0.20, HOW FOR WILL THE BLOCK SLIDE ON THE HORIZONTAL SURFACE BEFORE COMING TO REST??(HINT:-DIVIDE THE PATH INTO TOW STRAIGHT-LINE PARTS.)
http://www.gulfup.com/up/pngfiles/zBT33090.png
مشكورين:(