An inextensible rope passing over a smooth pulley has two blocks of mass 20 kg 
and 30 kg attached to its two ends. The mass of the pulley is l0 kg and radius of
gyration 0.3m. Determine the tension on the rope and the acceleration of the
masseb.

 

The man attempts to pull down the tree using the cable and small pulley arrangement 
shown. If the tension in AB is 60 N, determine the tension in cable CAD and the angle ɵ
which the cable makes at the pulley.

The 20-kg slender rod is pinned at O. For the moment the cable attached at the

end A suddenly breaks, you are asked to

(a) provide forces (free body diagram) and motion analysis

(b) determine the acceleration of the end A

(c) find out the reaction at the pin support.

In a CD player, a CD rotates from rest up to angular speed of   in a time interval, . It is necessary to calculate:

1. What is the angular acceleration of the disc, assuming the angular acceleration is uniform?

1. The angular displacement and the number of revolutions  done by the CD while coming up to speed?

1. If the radius of the disc is , what are the magnitudes of tangential speed and acceleration of a dust particle placed on the rim of the disc when