Final answer:
Different types of pulleys make work easier by increasing the mechanical advantage (MA) of the system, reducing the effort force required.
Step-by-step explanation:
Pulleys of different types make work easier by increasing the mechanical advantage (MA) of the system. The MA of a pulley system is determined by the number of cables pulling directly upward on the system. Each attachment adds an external force in the same direction, producing a total force that is nearly an integral multiple of the input force. This multiplication of force allows us to exert less effort force to lift heavy objects.