I am feeling confused why the speed was (u-wR). As per question, boy has u relative to platform ie. when boy jumped his speed u was greater than that of platform. For eg. let boy had x speed wrt ground. so x-wR=u ie. x=u wR. I don't know in what case we should use relative velocity and in which case we should take absolute velocity. Can anyone guide me?
7 years ago
by
Rupesh Koirala