1. (a) Define the term machine.
(b) Name six types of simple machines.
2. Give four reasons for using machines.
3. What is an ideal machine? State the principle of
an ideal machine.
4. The output energy of a real life machine is always
less than the input energy. Give two reasons for
this deficiency.
Answers
Answer:
machine as moving parts is does a particular task like washing machine
Answer:
1a : a mechanically, electrically, or electronically operated device for performing a task a machine for cleaning carpets.b : conveyance, vehicle especially : automobile. c : a coin-operated device a cigarette machine.
2 . to lift a heavy load by applying a small effort, i.e., to multiply effort.
to speed up the motion of a body.
to change the effort in the desire direction.
for doing unsafe and dengerous work.
3 .An ideal machine is a machine in which energy given as the output is equal to the input energy. The principle of an ideal machine is to convert all the given energy into a useful energy.
4 .Machine Efficiency
Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work). The output work is always less than the input work because some of the input work is used to overcome friction.