An ideal pulley system can lift a load of 1500 N by an effort of 300 N. The velocity ratio of the system is .
A pulley system can lift a load of 1200 N by an effort of 250 N. If the resistance due to the weight of movable parts and friction is 300 N. Find the total number of pulleys in the system.
A pulley system has a velocity ratio of 4 and an efficiency of 90 %. The effort required to raise a load of 300 N by the system is
A pulley system has a velocity ratio 3 and an efficiency of 80%. Draw a labelled diagram of this pulley system. Calculate :
(a) the mechanical advantage of the system, and
(b) the effort required to raise a load of 300 N.