[填空题]
A 65-kg person jumps from a window to a fire new51de-ox*i q )n:uhw ftl*f( 6r/i;)kxt. a dnv zu r3e;reckm1 18 m below, which stretches the net 1.1 m. Assume that the net behaves ve (;mrk6iefa *;)r.u1krx tz /3dlc nlike a simple spring, and
(a) calculate how much it would stretch if the same person were lying in it. m
(b) How much would it stretch if the person jumped from 35 m? m