ارجو المساعده عندي امتحان

انا عندي امتحان في هذي الاسأله فا الله يخليكم ابي حل له الله يوفقكم اكيد انكم ماترضون اني

السوال الاول .......
A 0.21-kg pine cone falls 14m to the ground, where it lands with a speed of 13 m\s
A) With what speed would the pine cone have landed if there had been no air resistance ?
B)Did air resistance do positive work, negative work ,or zero work on the pine cone?Explain

السوال الثاني .........
In the previous problem ,
A)How much work was done on the pine cone by air resistance
B)What was the average force of air resistance exerted on the pine cone?

السوال الثالث.......
A certain car can accelerate from rest to the speed V in T seconds . if the power output of the car remains constant ,
A)How long does it take for the car to accelerate from V to2V
?
B)How fast is the car moving at 2T seconds after starting?


بس بليز لا تسفهو موضوعي ترا عندي امتحان فاالله يفرج هم من يفرج عني ويوفقه بس طبعن شرحولي حلولكم

تكفون طالبتكم احد يرد علي