Question

1
Fluid are
MCQ with one or more correct answers.
Work done by friction is
[ ]
a) Zero
b) Positive
c) Negative
d) None
2. If normal reaction is doubled, the coeffcient of friction
a) Doubled
b) Halved
c) Not changed d) Tripled
3. Complete the sentense, Friction always
a) Helps the motion b) Opposes the motin c) Both of these d) None of these
4.
Friction is a
[ ]
a) Contact force b) Non contact force c) Magnetic force d) None of these
5.
[ ]
a) Gases
b) Liquids
c) Both a &b
d) None of these
6. Lubricants
a) Increase friction b) Reduce friction c) Both a &b
d) None
7. The shape of airplane is like a
[ ]
a) Bird
b) Car
c) Dog
d) All
8 Fluid friction is also known as
[ ]
a) Rolling friction b) Sliding friction c) Drag
d) Static friction
9. Friction changes the energy of an object from kinetic energy to
energy [ ]
a) Electric
b) Solar
c) Heat
d) Wind
10. Which type of friction occurs when solid surfaces slide over each other
a) Rolling
b) Static
c) Sliding
d) None of the above​

Answer 1

Answer:

option c, option d, option a ,option ,option B option B