用力將一5公斤重的木塊緊壓在牆上,如附圖所示,若木靜止不動,則下列敘述何者正確? (A)木塊所受牆壁的摩擦力5公斤重(B)木塊所受合力不為零(C)施力剛好為5公斤重就可以了(D)施力大小剛好可以

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28.用力將一5公斤重的木塊緊壓在牆上,如附圖所示,若木靜止不動,則下列敘述何者正確?

(A)木塊所受牆壁的摩擦力5公斤重
(B)木塊所受合力不為零
(C)施力剛好為5公斤重就可以了
(D)施力大小剛好可以抵銷木塊重力。

參考答案

答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增

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