The inclined plane depicted in Fig. 7-4 is 15 m long and rises 3.0 m. (a) What

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The inclined plane depicted in Fig. 7-4 is 15 m long and rises 3.0 m. 

(a) What minimum force F parallel to the plane is required to slide a 20-kg box up the plane if friction is neglected? 

(b) What is the IMA of the plane? 

(c) Find the AMA and efficiency if a 64-N force is actually required.15 m 3.0 m Fw (20)(9.81) N Fig. 7-4

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