往年物理碗真题分享来了 来看看2019年的最后几题

快到物理碗竞赛了，下面给大家分享一些2019年最后几个题目，有没做过题的同学可以先来试试哦！一起来看看这几道物理碗真题吧！

物理碗真题

An Atwood machine is shown in the diagram at the right with  m1=0.60 kg and m2=0.40 kg. What is the magnitude of the  acceleration of m2? Ignore friction and the mass of the pulley. 

(A) 4.2 m/s2 (B) 3.3 m/s2 (C) 2.0 m/s2 (D) 5.0 m/s2 (E) 1.0 m/s2 

A 30.0-N block falls straight down from a height of 10.0 m, and strikes the ground with a velocity  of 7.00 m/s. What average force of air friction acts on it as it falls? 

(A) 22.65-N (B) 45.45-N (C) 75.0-N (D)206.5-N (E) 293-N

The capacitor is initially uncharged. Which of the following choices best represents the current at  Point X immediately after the switch is closed? 

(A) Zero

(B) 24 mA directed to the right 

(C) 36 mA directed to the left 

(D) 48 mA directed to the left 

(E) 72 mA directed to the right

If the capacitor has a capacitance of 15 μF and is  uncharged prior to closing the switch, what is the steady state charge on the capacitor? (A) 3 μC (B) 45 μC (C) 75 μC (D) 90 μC (E) 120 μC

A 15.0-mW laser emits a beam that is 2.00 mm in diameter. What is the intensity of this beam?

 (A) 1.19 x 103 W/m2 (B) 1.19 x 104 W/m2 (C) 3.59 x 104 W/m2 (D) 4.77 x 104 W/m2 (E) 2.98 x 105 W/m2

The unit that is used to measure magnetic flux is:  

(A) Coulomb (C) (B) Farad (F) (C) Tesla (T) (D) Weber (Wb) (E) Henry (H)

物理碗真题就分享到这里了，除了要学课本上没讲过的知识，像这类知名度比较高的竞赛，往往有一个共同难度——答题速度。45分钟要完成40道题目确实是一个挑战，算算每道题只有1分钟07秒的时间。面对这样的高要求，如果感觉自己从头梳理有点没方向，欢迎点击预约试听【唯寻国际竞赛辅导班】——

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Physicsbow物理碗竞赛考点解析 从考试内容到高分技巧统统都有

Physicsbow物理碗竞赛真题解析 想拿就要看看这些考生常错的错题

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