楂樹腑鐗╃悊瀛︿範鏉愭枡
锛堢伩鑻ュ瘨鏄?/p>
**
鏁寸悊鍒朵綔锛?/p>
蹇呬慨
2
銆婃満姊拌兘鍙婂叾瀹堟亽瀹氬緥銆嬫祴璇曢
锛堟湰璇曞嵎棰樼洰涓湭鍔犺鏄庢椂锛?/p>
閲嶅姏鍔犻�熷害
g = 10m/s
2
)
涓�銆侀�夋嫨棰橈紙鍗曢�夐锛屾瘡灏忛
4
鍒嗭紝鍏?/p>
48
鍒嗭級
1.
濡傚浘鎵�绀虹殑鍥涚鎯呮櫙涓紝鍏朵腑鍔涘鐗╀綋娌℃湁鍋氬姛鐨勬槸
( )
A
锛庣伀绠吘绌鸿�岃捣鐨勬帹鍔?/p>
B
锛庡弶杞︿妇璧烽噸鐗╃殑涓惧姏
C
锛庝汉鎺ㄧ煶澶存湭鍔ㄦ椂鐨勬帹鍔?/p>
D
锛庨┈鎷夋湪澶村墠杩涚殑鎷夊姏
2.
鍏充簬鍔熺巼浠ヤ笅璇存硶涓纭殑鏄細
( )
A
锛庢嵁
P=W/t
鍙煡锛屾満鍣ㄥ仛鍔熻秺澶氾紝鍏跺姛鐜囧氨瓒婂ぇ
B
锛庢嵁
P=Fv
鍙煡锛屾苯杞︾壍寮曞姏涓�瀹氫笌閫熷害鎴愬弽姣?/p>
C
锛庢嵁
P=W/t
鍙煡锛屽彧瑕佺煡閬撴椂闂?/p>
t
鍐呮満鍣ㄦ墍鍋氱殑鍔燂紝灏卞彲浠ユ眰寰楄繖娈垫椂闂村唴浠讳竴鏃跺埢鏈哄櫒鍋?/p>
鍔熺殑鍔熺巼
D
锛庢牴鎹?/p>
P=Fv
鍙煡锛屽彂鍔ㄦ満鍔熺巼涓�瀹氭椂锛屼氦閫氬伐鍏风殑鐗靛紩鍔涗笌杩愬姩閫熷害鎴愬弽姣斻�?/p>
3.
姹借溅涓婂潯鏃讹紝鍙告満蹇呴』鎹㈡。锛屽叾鐩殑鏄?/p>
( )
锛?/p>
.
鍑忓皬閫熷害锛屽緱鍒拌緝灏忕殑鐗靛紩鍔?/p>
锛?/p>
.
澧炲ぇ閫熷害锛屽緱鍒拌緝灏忕殑鐗靛紩鍔?/p>
锛?/p>
.
鍑忓皬閫熷害锛屽緱鍒拌緝澶х殑鐗靛紩鍔?/p>
锛?/p>
.
澧炲ぇ閫熷害锛屽緱鍒拌緝澶х殑鐗靛紩鍔?/p>
4.
濡傚浘鎵�绀猴紝妗岄潰楂樹负
h
锛岃川閲忎负
m
鐨勫皬鐞冧粠绂绘闈㈤珮
H
澶勮嚜鐢辫惤涓嬶紝涓嶈绌烘皵闃诲姏锛屽亣璁剧
妗岄潰楂?/p>
H
澶勯噸鍔涘娍鑳戒负闆讹紝鍒欏皬鐞冭惤鍦板墠鐬棿鐨勯噸鍔涘娍鑳戒负锛?/p>
锛?/p>
A. -mgh B. mgH
C. mg(H-h) D. -mg(H+h)
5.
涓嬪垪涓庡脊绨у叿鏈夌殑寮规�у娍鑳芥棤鍏崇殑鍥犵礌锛?/p>
锛?/p>
锛?/p>
.
寮圭哀鐨勮川閲?/p>
锛?/p>
.
寮圭哀鐨勪几闀块噺
锛?/p>
.
寮圭哀鐨勫帇缂╅噺
锛?/p>
.
寮圭哀鐨勫姴搴︾郴鏁?/p>