رد: تجــــــمـــع اـلفــيـــــزيـــــــاء ..~
بنااات عندي ككم سؤال في النماذج ماعرفت احلهااا ياليت تحلوها ,,
1/ achild pulls a box along the floor by a string which makes 60 angle with the ground .if the child exerts a force of 20n and there is a frictional force of 3n how much work is being done on the box when it moves a distance 12m ?
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