A 30-Kg Block Moves Up a 40 $\degree$ Incline with Constant Speed Under the Action of a 26-N

question 48

Multiple Choice

A 3.0-kg block moves up a 40 $\degree$ incline with constant speed under the action of a 26-N force acting up and parallel to the incline.What magnitude force must act up and parallel to the incline for the block to move down the incline at constant velocity?

• A)14 N
• B)12 N
• C)16 N
• D)18 N
• E)25 N

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