問題詳情

3. A particle moves in the xy plane with a constant acceleration given by a = -

m/s2. At t = 0, its position and velocity are

m/s, respectively. Here, t and j are unit vectors ng x and y directions, respectively. What is the distance from the origin to the pa 2.0 s?
(A) 6.4 m
(B) 10 m
(C) 8.9 m
(D) 2.0 m
(E) 6.2 m

參考答案

答案：B

統計：A:1,B:0,C:0,D:0,E:0

難度：計算中