Question

Multiple Choice Questions
1. Which material do gymnasts apply on their hands to increase friction
for better grip
a) Oils
b) Soap c) Coarse substance
d) water
[
2. The relation between the change in the length of spring and the applied force is
a) Inversely proportional
b) Equal
1
c) Directly proportional
d) Never depends on the force
3. The bodies of birds and fishes must have evolved to shapes which would make
them not to loose much energy in overcoming
[ ]
a) Rolling friction
b) Static friction
c) Sliding friction
d) Fluid friction
4.
Which of the following friction has self adjusting force
[ ]
a) Sliding friction
b) Static friction
c) Rolling friction
d) Fluid friction​

Answer 1

Answer:

1 oil

2directly proportional

3sliding friction

4rolling friction