翻译一道英文关于力矩的数学题目3)Forthisquestion,usethematerialfromsection1.4（这个section是关于三角函数的）andtheknowledgethatthemomentofaforceisthecrossproductofthevectoroftheforcewiththevect

Question

翻译一道英文关于力矩的数学题目
3) For this question, use the material from section 1.4 （这个section是关于三角函数的）and the knowledge that the moment of a force is the cross product of the vector of the force with the vector from the axis of the turn to the point where the force is applied.
Given a wrench, prove that you can maximize the moment you can create with it by applying your
full force at the far end of the wrench, at a right angle to the wrench.
不要求解答,翻译一下再解析一下就好,看不太懂啊,解释得好有加分

Answer 1

他让你证明,用螺丝刀拧螺丝的时候,当力施加在螺丝刀最外端,并且施加的力和螺丝刀（也就是力臂）垂直的时候,力量最大（就是杠杆处于最省力的状态）.