Physics Unit2: Kinematics One Dimensional Motion (id: 1cfc0e728)

本题目来源于试卷: Physics Unit2: Kinematics One Dimensional Motion，类别为 通用国际物理

[填空题]
A ball is thrown straight up w8vj/wantaq(: i-1 wu-ade ry8 ith a s,/1f1 tx +pmcd thvq6gpeed of 30 m/s. (only fill in numerical value in 161thgvq/ , pt dc+xfmthe blanks)
(a.) How long does it take the ball to reach the maximum height?    $s$
(b.) What is the maximum height reached by the ball?    $m$
(c.) What is its speed after 4.2 s?    $m/s$

参考答案:
空格1: 3.1±5%  空格2: 46±5%  空格3: 11±5% 


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