問題詳情

1.A 10 kg uniform ladder 25 m long rests against a smooth wall as shown in Fig* L An 80 kg manS climbs up the ladder to a point A,- a distance I>2.0 m from the bottom of the ladder, before theI ladder slips. What is the coefficient of friction between the ladder and the ground if the angle1 between the ladder and ground is 60° ? (25%

參考答案

答案:C
難度:簡單0.723922
統計:A(258),B(87),C(4615),D(1415),E(0) #
個人:尚未作答書單:精熟、有意義學習

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