ʱ : 江西省新余市名校2019年中考物理一模试卷word版有答案+(13套中考模拟试? - 百度文库ϿʼĶ
⣺ÿ1֡21֣
8ũ彨Ŀչũij˸Եı仯ԭú¯ѾҺ森Һ
úȣѧͻŵֵ ҺƿеʵװҺ壬 ķʹҺҺΪ5kg20ˮڱѹտˮյ J[c
3
ˮ=4.210J/kg?棩] 9׳þ˻ᷢԭ֮һ˿ ڵڱϣӰ˲ԣԭ֮ǵ˿ϸ ڵѹʱʵʹʱ 10СƷǮӮȫڵϲСֳС ģ
ģСģ¡ɡܱ棬Ϊǵ ƣ 11ͼ11ʾijվڸߴ100N240N
1m˿˷ùΪ JܹΪ J ûĻеЧΪ
12ˮܵȾɢijζ
ͼ11 ҳζĽҪŨЩ˵ йأ
ͬʱӻеµΪˮнϴ
132018114ϣͷ·32Ÿ·淢һͨ¹ʣͬʻ
βBɲ________ײA۲Aβ(ͼ4)˵ܹı___________ʱAе˾𱣻õ___________(ѡȫҡͷ)
14̽ͨĵ˵ѹĹϵʱ¼ʵͨͼ5ʾͼ
ͼɵóۣڵb˼1VĵѹʱͨbĵΪ_________ɼbĵΪ___________ab崮ӵѹΪ3VĵԴʱͨĵ________ ͼ⣨3С⣬7֣
151Ҫʹܸͼ1ʾλþֹF AF Bl AlB
2ͼ2ʾǽûˮеСԲֺˮϸʱСʾͼ 3ͼ3ʾͨ߹ΧĴŸ߷ͼбͨ߹ܵN͵Դ
ͼ1
ġʵ⣨3С⣬19֣
163֣1ͼ1ʾij cm
2ͼ2ʾɲƵʾ N
3ͼ3ʾҺ¶ C
ͼ1
17(8)̽ܵĴСЩйء
(1)ͬСͬһ⻬бֱABʼ˶Ȼˮƽϵֽֽˮƽƶһξֹͼ18ʾ
(2)òͬСͬһ⻬бֱBʼ˶Ȼˮƽϵֽֽˮƽƶһξֹͼ18ʾסʵУ
A h B 2h
m
m
m
B 2h B 2h
ͼ18
2m
ʵͨ۲ ij̣жСܵĴС
ͼòͬСͬһ߶ȹµĿˮƽʱͬ ѡͼ̽Ƕ_____________Ĺϵǣ__________ȣóĽǣ
ѡͼ̽Ƕ________ĹϵóĽǣ____________ о࣬ʵȡʵ鷽
188֣(1)ñʻߴ浼߰ͼ15ʵͼҪ㵱ƬPƶBʱ
·ĵΪ(ձһ)(2) (2)պϿʱָָͼ16ʾֵ____________(1)
ͼ15
(3)ijβʱʾͼ17ʾ±һв(1)
(4)(4)һݣԵõۣ____________________________
ݣԵõۣ____________________________ 塢⣨2С⣬196֡207֣13֣
19(6)ͼl4ʾСܲ϶壮ܲ5msٶܶ30minܶܶΪ40N
(1)ʱ൱˶·̣
(2)ʱ˶ٹ
(3)ĹǶ٣
20 ijˮƿұʾˮƿװˮڶѹ¹ѹǿΪ1ѹCˮ=4.2103J/kg棩 1ʱˮƿĵ
2ƿ20ˮ14minտƿ
ˮյ٣ʱˮƿ ЧǶ٣
ۺ⣨3С⣬19֣
211Сͬѧһɲơһ顢ͬձֱװһˮúͣԽҺеܵĸ̽ͼ17ʾ̼̽йݡ ͼ17
ٷͼBCD˵С__________________йء ڷͼ__________________˵СҺܶйء ȫûúܵĸ__________________N
213ͼDzܶȵḶ́13-1ͼɶձ13-2ͼɶձͽ͵13-3ͼɶձȫ͵ô͵m= g͵V= cm3͵ܶȦ= kg/m3.
226֣С̽ɡʵʱΪ15cm 1ͼ1ʾͨγɵǣ
2ʵУľͼ2ʾʱڹϿɵһ /
Ŵ/С/ȴдһԭƳɵ豸 3СԼĽ۾֮俿λãԭģˣıλãӦ Զ/ķƶʹʵ˵ʵĽ۾ܽԭܰѳĤ ǰ/Ĥϣ 236֣Ϲ·2018ͨг顱봫ͳ
Ƚϣг顱ϲ¼ش
1ͼʾͷƿԼС
2ǿȸߡܶ ϽȲ죬ʹС
гУ
⣺
3гٶȴ200km/h90km/hĹвûеɲáƶг
ʻת磬гĻеתΪ ܴ 4гʻʱгΧ ʹгΧѹǿ С䡱
·3mڽиǽгʱ˺屻ѹΣգ 5콨ɺԼʹãΪȼȼŷŵβȾֻȵЧӦ
Ϊͬļ--һŬܡšҪ̸̸һ㽨飮