如图所示，一个物体静止于水平地面上，画出物体所受到的支持力和重力的示意图 物体静止于水平地面上，画出物体所受力的示意图
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重力从重心竖直向下画，标出符号G，支持力从重心竖直向上画，标出符号F，注意两个力大小相等，所画的长度要相等，如图：绛旓細鐗╀綋姘村钩鏂瑰悜鍙楀姏锛欶cos37掳锛0.25N 鐗╀綋绔栫洿鏂瑰悜鍙楀姏锛欸=Fsin37掳锛婲 鎵浠ワ細N=G-Fsin37掳锛20锛8脳0.6锛15.2N Fcos37掳锛0.25N锛漨a 鍗筹細8脳0.8锛0.25脳15.2锛2a 瑙ｅ嚭锛歛=1.3m/s2 鎵浠ワ細vt=at锛1.3脳5锛6.5m/s S=0.5at^2锛0.5脳1.3脳5脳5锛16.25m 鏉ヨ嚜銆婁腑瀛...
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