1
(
浜烘暀鐗堬級鍏勾绾ф暟瀛﹀簲鐢ㄩ澶у叏
鍏勾绾ф暟瀛﹀簲鐢ㄩ
1
涓�銆佸垎鏁扮殑搴旂敤棰?/p>
1
銆佷竴缂告按锛岀敤鍘?/p>
1
2
鍜?/p>
5
妗讹紝杩樺墿
30%
锛岃繖缂告按鏈夊灏戞《锛?/p>
5
梅锛?/p>
1
2
锛?/p>
30%
锛?/p>
=5
梅
0.2=25
锛堟《锛?/p>
2
銆佷竴鏍归挗绠￠暱
10
绫筹紝绗竴娆℃埅鍘诲畠鐨?/p>
7
10
锛岀浜屾鍙堟埅鍘讳綑涓嬬殑
1
3
锛岃繕鍓╁灏戠背锛?/p>
10
脳锛?/p>
1
锛?/p>
7
10
锛壝楋紙
1
锛?/p>
1
3
锛?/p>
=10
脳
3
10
脳
2
3
=2
锛堢背锛?/p>
3
銆佷慨绛戜竴鏉″叕璺紝瀹屾垚浜嗗叏闀跨殑
2
3
鍚?/p>
,
绂讳腑鐐?/p>
16.5
鍗冪背锛岃繖鏉″叕璺叏闀垮灏戝崈绫筹紵
16.5
梅锛?/p>
2
3
锛?/p>
1
2
锛?/p>
=99
锛堝崈绫筹級
4
銆佸笀寰掍袱浜哄悎鍋氫竴鎵归浂浠讹紝寰掑紵鍋氫簡鎬绘暟鐨?/p>
2
7
锛屾瘮甯堝倕灏戝仛
21
涓紝杩欐壒闆朵欢鏈夊灏戜釜锛?/p>
21
梅锛?/p>
1
锛?/p>
2
7
锛?/p>
2
7
锛?/p>
=49
锛堜釜锛?/p>
5
銆佷粨搴撻噷鏈変竴鎵瑰寲鑲ワ紝绗竴娆″彇鍑烘�绘暟鐨?/p>
2
5
锛岀浜屾鍙栧嚭鎬绘暟鐨?/p>
1
3
灏?/p>
12
琚嬶紝杩欐椂浠撳簱閲岃繕鍓?/p>
24
琚嬶紝涓ゆ鍏卞彇鍑哄灏戣锛?/p>
瑙ｏ細璁句袱娆″叡鍙栧嚭
x
琚?/p>
2
5
x
锛?/p>
(
1
3
x
锛?/p>
12)
锛?/p>
24=x
瑙ｅ緱锛?/p>
x=45
6
銆?/p>
鐢蹭箼涓ゅ湴鐩歌窛
1152
鍗冪背
,
涓�鍒楀杞﹀拰涓�鍒楄揣杞﹀悓鏃朵粠涓ゅ湴瀵瑰紑
,
璐ц溅姣忓皬鏃惰
72
鍗冪背
,
姣斿杞?/p>
蹇?/p>
2
7
锛屼袱杞︾粡杩囧灏戝皬鏃剁浉閬囷紵
72
梅锛?/p>
1
锛?/p>
2
7
锛?/p>
=56
锛?/p>
km/h
锛?/p>
1152
梅锛?/p>
72
锛?/p>
56
锛?/p>
=9
锛?/p>
h
锛?/p>
7
銆佷竴浠朵笂琛ｆ瘮涓�鏉¤￥瀛愯吹
160
鍏?/p>
,
鍏朵腑瑁ゅ瓙鐨勪环鏍兼槸涓婅。鐨?/p>
3
5
,
涓�鏉¤￥瀛愬灏戝厓
?
瑙ｏ細璁句竴鏉¤￥瀛?/p>
x
鍏?/p>
锛?/p>
x
锛?/p>
160
锛壝?/p>
3
5
= x
瑙ｅ緱锛?/p>
x=240
8
銆侀ゲ鍏荤粍鏈夐粦鍏?/p>
60
鍙?/p>
,
鐧藉厰姣旈粦鍏斿
1
5
,
鐧藉厰鏈夊灏戝彧
?
60
脳锛?/p>
1
锛?/p>
1
5
锛?/p>
=72
锛堝彧锛?/p>
9
銆佸鏍¤鎸栦竴鏉￠暱
80
绫崇殑涓嬫按閬?/p>
,
绗竴澶╂寲浜嗗叏闀跨殑
1
4
,
绗簩澶╂寲浜嗗叏闀跨殑
1
2
,
涓ゅぉ鍏辨寲浜嗗灏?
绫?/p>
?
杩樺墿涓嬪灏戠背
? 80
脳锛?/p>
1
4
锛?/p>
1
2
锛?/p>
=60
锛堢背锛?/p>
80
锛?/p>
60=20
锛堢背锛?/p>
鍏勾绾ф暟瀛﹀簲鐢ㄩ
2
浜屻�佹瘮鐨勫簲鐢ㄩ
1
銆?/p>
涓�涓暱鏂瑰舰鐨勫懆闀挎槸
24
鍘樼背
锛岄暱涓庡鐨勬瘮鏄?/p>
2
锛?/p>
1
锛岃繖涓暱鏂瑰舰鐨勯潰绉槸澶氬皯骞虫柟鍘樼背锛?/p>
24
梅
2
梅锛?/p>
2
锛?/p>
1
锛?/p>
=4(cm)
锛?/p>
4
脳
2
锛壝?/p>
(4
脳
1)=32(cm
2
)
2
銆?/p>
涓�涓暱鏂逛綋妫遍暱鎬诲拰涓?/p>
96
鍘樼背
锛?/p>
闀裤�?/p>
瀹姐�?/p>
楂樼殑姣旀槸
3鈭?
鈭? 锛?/p>
杩欎釜闀挎柟浣撶殑浣撶Н鏄灏戯紵