1
銆?/p>
涔樺潗
K1048
绌鸿皟蹇�熷垪杞︼紝
07
锛?/p>
12
浠庡埄宸濆嚭鍙戯紝
07
锛?/p>
54
鍒拌揪鎭╂柦锛岄獙璇佸埄宸濊嚦鎭╂柦閾佽矾璺濈涓?/p>
61
鍏?/p>
閲岋紟姹傚垪杞︿粠鍒╁窛鑷虫仼鏂界殑閫熷害锛?/p>
瑙ｏ細
t=07
锛?/p>
12
锝?/p>
07
锛?/p>
54=42min=42/60h=7/10h
锛?/p>
s=61km
锛?/p>
v=s/t=61km/7/10h
鈮?7.14k
m/h
锛?/p>
绛旓細鍒楄溅浠庡埄宸濊嚦鎭╂柦鐨勯�熷害涓?/p>
87.14km/h
锛?/p>
2
銆?/p>
浜轰綋鐨勫瘑搴︿笌姘寸殑瀵嗗害宸笉澶氾紙璁＄畻鏃跺綋浣滀笌姘寸殑瀵嗗害鐩哥瓑锛?/p>
锛屼及璁′竴涓嬭嚜宸辩殑璐ㄩ噺锛屽苟姹傚嚭鑷繁鐨勪綋
绉紟
瑙ｏ細鑷繁鐨勮川閲忕害涓?/p>
50kg
锛屾按鐨勫瘑搴︿负
1.0脳
10
3
kg/m
3
锛?/p>
鈭?/p>
蟻=
m/v=50kg/1.0脳
10
3
kg/m
3
锛?/p>
鈭磋嚜宸辩殑浣撶Н锛?/p>
V=m/
蟻
=50kg/1.0脳
10
3
kg/m
3
=5脳
10
-2
m
3
锛?/p>
绛旓細鑷繁韬綋鐨勪綋绉负
5脳
10
-2
m
3
锛?/p>
3
銆?/p>
鎴戝競妲愬畨璺珮鏋舵ˉ鏄渷浼?/p>
鈥?/p>
鍥涙í鍏旱
鈥?/p>
璺綉涓疮绌垮崡閮ㄥ競鍖轰笢瑗挎柟鍚戠殑涓昏骞查亾锛屽弻鍚?/p>
4
杞﹂亾锛屾湁鏁堥伩鍏?/p>
浜嗛�氱殑鎷ュ牭锛?/p>
锛?/p>
1
锛夋ˉ涓婃湁涓�浜ら�氭爣蹇楃墝濡傚浘锛屾暟瀛楃殑鍚箟锛?/p>
锛?/p>
2
锛?/p>
浠庝笢浜岀幆鍒拌タ浜岀幆闀跨害
12km
锛?/p>
鍦ㄩ伒瀹堜氦閫氳鍒欑殑
鍓嶆彁涓嬶紝
涓�杈嗗皬杞︿粠涓滀簩鐜椹惰嚦瑗夸簩鐜嚦灏戦渶瑕佸灏?/p>
鍒嗛挓锛?/p>
瑙ｏ細
锛?/p>
1
锛?/p>
浜ら�氭爣蹇楃墝
80
鐨勫惈涔夋槸锛?/p>
姝よ矾娈甸檺閫?/p>
80km/h
锛?/p>
锛?/p>
2
锛?/p>
灏忚溅浠ユ渶澶ч�熷害
80km/h
琛岄┒鏃讹紝
鎵�闇�鏃堕棿鏈�鐭紝
鈭?/p>
v=s/t
锛?/p>
鈭存渶鐭椂闂达細
t=s/v=12km/80km/h=0.15h=9min
锛?/p>
绛旓細锛?/p>
1
锛夋璺闄愰�?/p>
80km/h
锛?/p>
锛?/p>
2
锛変竴杈嗗皬杞︿粠涓滀簩鐜椹惰嚦瑗夸簩鐜嚦灏戦渶瑕?/p>
9
鍒嗛挓锛?/p>
4
銆?/p>
鍒堕�犻搧璐ㄦ満浠舵椂锛岄渶瑕佸厛鍋氭湪妯★紝鐒跺悗鏍规嵁鏈ㄦā鍋氬嚭绌哄績鐨勫瀷鑵旓紝鏈�鍚庢祰娉ㄩ搧姘村埌鍨嬭厰鍐呴儴锛屽舰鎴愭渶缁?/p>
鐨勯搧鍒跺搧锛庢煇鏈烘鍘傝閾搁�?/p>
100
涓搧璐ㄦ満浠讹紝鎵�鐢ㄧ殑鏈ㄦā瀵嗗害涓?/p>
0.7g/cm
3
锛屾瘡鍙湪妯＄殑璐ㄩ噺鏄?/p>
4.2kg
锛屾眰
鎵�閾搁�犵殑閾佽川鏈轰欢鐨勬�昏川閲忥紟
锛堥搧鐨勫瘑搴︿负
7.9脳
10
3
kg/m
3
锛?/p>
瑙ｏ細鈭?/p>
蟻=
m/v
锛岄搧宸ヤ欢鐨勪綋绉拰鏈ㄦā鐨勪綋绉浉绛夛紝
鈭存湪妯＄殑浣撶Н锛?/p>
V=m/
蟻=
4.2kg/0.7g/cm
3
=6脳
10
-3
m
3
锛?/p>
鈭?/p>
蟻=
m/v
锛?/p>
鈭翠竴涓搧璐ㄦ満浠剁殑璐ㄩ噺锛?/p>
m=蟻
閾?/p>
V=7.9脳
10
3
kg/m
3
脳
6脳
10
-3
m
3
=47.4kg
锛?/p>
100
涓満浠剁殑璐ㄩ噺涓?/p>
47.4kg脳
100=4740kg
锛?/p>
绛旓細閾搁�犵殑杩?/p>
100
涓満浠剁殑鎬昏川閲忎负
4740kg
锛?/p>
5
銆?/p>
閫氳繃杩欏紶鍑虹杞﹀彂绁ㄧ殑鍐呭锛岃绠楀嚭绉熻溅鍦ㄨ繖娈佃矾绋嬩腑鐨勫钩鍧囬�熷害锛?/p>
瑙ｏ細鍑虹杞﹁椹剁殑鏃堕棿
t=10
锛?/p>
05-10
锛?/p>
00=5min=300s
锛?/p>
鍑虹杞﹁椹剁殑璺▼
s=6km=6000m
锛?/p>
鍑虹杞﹀湪杩欐璺▼涓殑骞冲潎閫熷害锛?/p>
v=s/t=6000m/300s=20m/s
锛?/p>
绛旓細鍑虹杞﹀湪杩欐璺▼涓殑骞冲潎閫熷害涓?/p>
20m/s
锛?/p>