[دلوعة عبودي]

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

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