Question

D. Answer the following questions in brief.

1. State the meanings of the terms (a) rolling friction
(b) fluid friction

2. State the likely cause of friction.

3. A box is resting on floor. To move it, a (variable) force is applied as shown in the diagram below. Give the answer of the questions given below.

*(a)* Give the (likely) value of the force of limiting friction.

*(b)* Why does the box stay at rest in the cases corresponding to Fig(a) and Fig(b)?

*(c)* Mark the direction of frictional force, and mention the kind of frictional force that comes into play, in each case.

4. Name the kind of frictional friction, that comes into play, when a book, kept on a collection all cylindrical pencils, is moved by pushing it.

5. Why are objects given special shapes when they are moving through fluids? write the name given to this special shapes?​​

Answer 1

Answer:

D.A..V SCHOOL SE HO KYA TUMMM KYA NAME VHA TUMHARAAAA PEHLE YEBBTAOOO KAHA KE D.A.V SE HO