图你会画吗?解释起来有点麻烦,可以先画一个船,或者长方形都行,然后在中心画一个180N的箭头向下,接着在船上画两个人,一个是590N往下,另一个是850N往下。接着在船上侧画两条绳子,左右个一条,如果需要画力,就是一条670N向上,一条950N向上(这个下面解释)
你应该是在外国读书吧,我用英语说你应该会比较能理解一点吧
(b) In here, all downward forces are the forces due togravity, so the total downward force is 180N(the boat)+590N(oneperson)+850N(another person)=???? Calculator
(c) The upward force must be equal to the downward force, so same as the answer above.
(d) Use the number you just calculated and minus 670N(tension in one rope), and the answer is the tension in the second rope …My answer is 950N…But you need to check it in case.