Give four reasons for using machines.
Machines are used to :
Define the term efficiency of a machine. Give two reasons for a machine not to be 100% efficient?
Give reasons why :
(a) Travelling bags have wheels.
(b) Iron pipes are fitted on an inclined plane for pushing up heavy loads.
(c) We should take care of machines.
(d) We should use a pulley to draw water from a well.
State four ways in which machines are useful to us.
give me four conditions for a machine to be ideal machine?