A man squating on the ground gets straight up and stand . The force of reactionof ground on the main during the process is

A man squating on the ground gets straight up and stand . The force of

1.	A man squating on the ground gets straight up and stand . The force of reactionof ground on the main during the process is
Answer» constant and equal to mg in magnitude constant and greater than mg in magnitude variable but alwaysgreater than mg at first greater than mg and LATER BECOMES equal to mg Solution :When the man is squating on the ground , he has to balance FRICTIONAL force and his weight .In this CASE , RESULTANT force = firction + mg `F_(R) gt mg` When the man gets straight up in that case friction `approx ` mg