A ball falls from rest through air and eventually reaches a constant velocity. For this fall, forces X and Y vary with time as shown. What are forces X and Y ?
force X: air resistance / force Y: resultant force
2 )
force X: air resistance / force Y: weight
3 )
force X: upthrust / force Y: resultant force
4 )
force X: upthrust / force Y: weight
تحلیل ویدئویی تست
تحلیل ویدئویی برای این تست ثبت نشده است!