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19โ€“13. The slender rod has a mass m and is suspended at its end A by a cord. If the rod receives a horizontal blow giving it an impulse I at its bottom B, determine the location y of the point P about which the rod appears to rotate during the impact.
19โ€“15. A 4-kg disk A is mounted on arm BC, which has a negligible mass. If a torque of M = (5e0.5t ) N # m, where t is
in seconds, is applied to the arm at C, determine the angular velocity of BC in 2 s starting from rest. Solve the problem assuming that (a) the disk is set in a smooth bearing at B so that it moves with curvilinear translation, (b) the disk is fixed to the shaft BC, and (c) the disk is given an initial freely spinning angular velocity of VD = {โˆ’80k} rad> s prior to application of the torque.


250 mm


60 mm

M = (5e0.5t) N ยท m

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