Aworker is raising a 9.2-m-long ladder of mass 53 kg asshown.
knowing that a = 1.8m and that the force exerted bythe worker is
perpendicular to the ladder, determine (a)the forceexerted by the
worker, (b) the reaction at b.

What precautions should you take to prevent injuries when dealing with heavy loads?

If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.