1. Before starting any manually handled procedure (lifting, lowering, pushing, pulling or carrying), it is important to assess the situation. This is commonly referred to as ‘sizing up the load’.
Similarly, in industry, handling heavy items by machines is controlled by overload safety switches. Discuss three different applications of Overload Protection Systems. (Relation to Ch 4 & 5 – Ivanoff V., Engineering Mechanics).
2a. Research and briefly summarize some general scientific principles of mechanics of machines in relation to the following matters:
i. The definition of a machine.
ii. Mechanical advantage and velocity ratio in a set of rope pulley blocks with n pulleys.
iii. Mechanical advantage and velocity ratio as related to the efficiency of a machine.