Question

1)Give some examples of simple machine.
2)Give some examples of complex machines.
3)Define efficiency of a machine.​

Answer 1

Answer:

example of some simple machines are Pulley wedge , incline plane, lever

examples of some complex machines are are bicycle , electric motors .

efficiency is defined as the ratio between the work output and work input to the machine

Answer 2

simple machines :---

1) a wedge

2) axel

3) wheel

complex machines :---

1) cars

2) bicycles

3) stapler

efficiency of a machine :---

efficiency of machine concerts how energy use in machine or how energy lost to friction and how energy use for heating and how energy covered to useful output .

example of machine efficiency :--

a lever , automobile ..

This is your answer....