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:
1.(a) an apparatus using mechanical power and having several parts, each with a definite function and together performing a particular task.
(b) There are 6 basic simple machines; the lever, the wheel and axle, the inclined plane, the wedge, the pulley, and the screw. Sever
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. The term ideal machine refers to a hypothetical mechanical system in which energy and power are not lost or dissipated through friction, deformation, wear, or other inefficiencies. An ideal machine is that in which there is no dissipation of energy in any manner. In an ideal machine, the work output is equal to the work input, i.e., efficiency of an ideal machine is 100%
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