Answered

Ball bearings are used in prayer wheels. This is to:

A. Make the prayer wheel turn easier.
B. Reduce sound.
C. Support the prayer wheel.
D. Reduce the mass of the prayer wheel.

Which one of the following is a disadvantage of friction?

A. Wearing out of the shoe sole.
B. Walking on the path.
C. Running on the ground.
D. Lighting a matchstick.



Answer :

GinnyAnswer

Final answer:

Friction in mechanical systems has advantages like reducing resistance in prayer wheels but can lead to disadvantages like wearing out shoe soles.


Explanation:

Friction plays a crucial role in various mechanical systems. For example, iBall bearings in prayer wheels help reduce friction to make the wheel turn easier. On the other hand, a disadvantage of friction can be the wearing out of the shoe sole due to the resistance between surfaces.


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