Question

1. Input is the work done __ the machine and output is the work done the machine. 2. A lever of the first class has __ in the middle.3. An oar of a boat is an example of ___ class lever. ​

Answer 1

Explanation:

In a first class lever, you have the fulcrum, which is the fixed point against which the lever works, between the effort force and the resultant ...