Question

Why is this so?
(a) Traveller’s bags have wheels.
(b) Machines have to be maintained.
(c) A bicyle is said to be a complex machine.

Answer 1

(A) Traveller's bags have wheels because It move easy from one place to other place.
(B) machine have to be maintained. Because machine are not maintained . Machine was created sound and do not work properly .
(C) because bicyle was save petrol and not do pollution .

Answer 2

Hey dear,

● Answers -

(1) Usually travellers have to carry lot of luggage. So these bags have wheels so as to reduce the efforts of lifting the bag.

(2) Machines have various parts which may get corroded or stuck to each other. Hence, machines are maintained by regular oiling which reduces the friction between parts.

(3) Bicycle consist of several simple machines like wheel, axle, pedal, etc. Hence, its called complex machine.


Thanks for asking..