一质点沿半径R=1 m的圆轨道作圆周运动,其角位置与时间的关系为θ= t 2 +1(SI),则质点在t =1 s时,其速度和加速度的大小分别为
A.
1 m/s, 1 m/s 2
B.
1 m/s, 2 m/s 2
C.
1 m/s, m/s 2
D.
2 m/s, m/s 2
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
皮皮学刷刷变学霸
举一反三
【简答题】Venice is the world's famous island city in northern Italy. Founded in the 5th century, Venice became a major maritime power in the 10th century. In the Middle Ages and the Renaissance, Venice was a m...
【单选题】听力原文: La Fenice, Venice's historic opera house which was destroyed by fire eight years ago, has reopened with a gala performance of Giuseppe Verdi's opera 'La Travolta'. The first performance of 'Trav...
A.
It caught on*fire in January 1996.
B.
Two. electricians Were sent to prison because of the accident.
【单选题】Venice September 20 — The Venice Tourism Board is launching a new advertising campaign to draw visitors to the city. Using images of James Franco, the region' s best known seventeenth-century painter,...
【简答题】Use the correct words from "import/inhale/introverted/exclude/expense or their opposite meaning words "to complete the following sentences.Be sure to use the correct form of the word. It is harmful to...