force是力量或者逼迫的意思，而compulsory则是强制性的意思，区别可以从以下例子看出：

It is compulsory policy for all of us to accept the vaccine， at least you are forced to take a covid 19 test. 接受疫苗是我们所有人的强制性政策，至少您被迫接受 Covid 19 测试。