1. Sliding friction is smaller than static friction.

Question

Fill in the blanks:

1. Sliding friction is _______than static friction.
2. Friction is important for many of our ________. 
3. Friction can be increased by making a _______rough.
4. The sole of the shoes and the tires of the vehicles are threaded to _________friction.
5. Friction is sometimes ____________.
6. Friction can be reduced by using ______
7. Friction produces _____. 

Answer 1

1. Sliding friction is smaller than static friction.
2. Friction is important for many of our activities. 
3. Friction can be increased by making a surface rough.
4. The sole of the shoes and the tires of the vehicles are threaded to increase friction.
5. Friction is sometimes undesirable.
6. Friction can be reduced by using lubricants.
7. Friction produces heat.