如圖,在長(zhǎng)方形OABC中,OA=BC=10,AB=OC=6,以O(shè)為原點(diǎn),OA為x軸,OC為y 軸,建立平面直角坐標(biāo)系.動(dòng)點(diǎn)P從點(diǎn)A出發(fā),沿A→O→C→B路線運(yùn)動(dòng)到點(diǎn)B停止,速度為4個(gè)單位長(zhǎng)度/秒;動(dòng)點(diǎn)Q從點(diǎn)O出發(fā),沿O→C→B路線運(yùn)動(dòng)到點(diǎn)B停止,速度為2個(gè)單位長(zhǎng)度/秒;當(dāng)點(diǎn)P到達(dá)點(diǎn)B時(shí),兩點(diǎn)同時(shí)停止運(yùn)動(dòng).設(shè)運(yùn)動(dòng)時(shí)間為t.
(1)寫出A、B、C三個(gè)點(diǎn)的坐標(biāo);
(2)當(dāng)點(diǎn)P恰好追上點(diǎn)Q時(shí),求此時(shí)點(diǎn)P的坐標(biāo);
(3)當(dāng)點(diǎn)P運(yùn)動(dòng)到線段BC上時(shí),連接AP、AQ,若△APQ的面積為3,求t的值.