Question

Statics

7.2 The coefficients of friction between the block and the rail are s 0.30 and pk 0.25. Find the magnitude and direction of the smallest force P required: (e) to start the block up the rail, (b) to keep it from moving down. HINT. First, visualize graphically (i.e. make a sketch) how much ? must be for P to be minimum 500 N ANS. (a) P 392 N 51.7 (b) P = 157 N 18.30

Answer 1

5o0 KN401 5-053 40 เจ6

lan d : f 163.2 491