Question

QUESTION :-
In the attachment there is an Activity given in my book and I have to make a video on this
I have to give Full Explanation
So you have to give me full explanation

BONUS :-
BRAINLIEST ANSWER
THANKS​

Answer 1

Answer:

It is observed that the book moves efficiently when placed on cylindrical pencils or rollers. It can be concluded that rolling friction is smaller than the sliding friction

Explanation:

mark my answer please

Answer 2

Answer:

when the pencils are placed under the book , we can move the book easily because there is no friction force acting on it. it is easy to move heavier objects on rollers rather than sliding them. that's why we observe that shopping carts have wheels so that the stuff in it can be easily moved

Explanation:

hence we can say that ball bearings reduce friction

hope it helps

and please check my 2nd question