Physics
Answer
To increase the life span of a machine following precautions must be followed :
- We should keep the machines clean and free from dust.
- If the parts of the machine are made of iron, they can rust. To prevent them from rusting, such parts must be painted.
- Friction causes wear and tear of the moving parts of a machine. To reduce friction, these parts must be properly lubricated from time to time.
Related Questions
What is a wedge? Give two examples.
Name the machine to which the following belong :
(a) Beam balance
(b) Lemon crusher
(c) Sugar tongs
(d) Ramp
(e) Door knob
(f) Needle
Select the correct statement :
(a) A wheel barrow is a lever of class I.
(b) The efficiency of a machine is always 100%.
(c) Friction in moving parts of a machine reduces its efficiency.
(d) No lever has the mechanical advantage greater than 1.
(e) It is easier to lift a load vertically up than to push it along an inclined plane.
(f) A screw is made by two inclined planes placed together.
Name six simple machines. Give an example of each machine.