34. A police crime lab is trying to determine whether someone was murdered or died as a result of an accident. The victim was struck in the temple by a 4 kg sculpture that is alleged to have fallen off a bookcase. The sculpture presumably fell a distance of 20 m and the corner that struck him had an area of 0.25 cm2 . If the time for the sculpture to stop was 1 ms, the pressure on his temple, in N/m2 , was ______. (Gravitational acceleration g = 10 m/s2 )
(A) 3.2 × 105
(B) 1.6 × 106
(C) 3.2 × 106
(D) 1.6 × 109
(E) 3.2 × 109

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統計: A(4), B(1), C(2), D(2), E(14) #3101785

詳解 (共 3 筆)

#5814900
別被落落長的文字騙到了,這題也算簡單的1...
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#7225751
這是一道結合了能量守恆(或運動學)、動量...
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#7225763
這是一道結合了能量守恆、動量與衝量以及壓...
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