[填空题]
A stone is thrown ve8o;6)trpj7+ fid2sas;js czs b og;u0wz1ak0v) qnc.rtically upward with a speed of $36 \; m/s$ from the edge of a cliff 90.0 m high (a) How much later does it reach the bottom of the cliff? $s$ (b) What is its speed just before hitting? $m/s$ (c) What total distance did it travel? $m$
