III. Directions: Choose the letter of the best answer.
1. All of the following are examples of desirable friction EXCEPT
2. Friction produces
A. braking B, costing C. driving D, walking
in the different machine parts that is absorbed by the surrounding environment A. force B. friction
3. Mang Tonyo is holding the nail while he hits it with a hammer. What example of friction is he doing? A. Static friction B. Rolling fr
Undesirable friction
4. All of the following describe undesirable friction, EXCEPT
A. friction opposes the motion B. friction wears things
secures a foothold when the horse pulls a cart D. friction makes the engines of automobiles to use more fuel
5. Which of the following statements shows the important application of desirable friction? A. Test hand grips with glass bottles.
necessary. C. Write legibly and properly using pen or pencil. D. Test the sole of new shoes in an open and slippery road,
6. When is friction desirable? A. Writing on a paper B. Putting extra effort when walking C. Reducing the serviceable life of the
move the block on a rough surface
7. All of the following statements describe undesirable friction EXCEPT
A. Friction opposes the motion. B. Fricti
shoes, C. Friction holds the nail steady while we hammer it. D. Friction makes the engines of automobiles use more fuel
8.
is used to reduce the friction between parts and gears in a machine. A. Fuel B. Grease C. Oil D. Water
9. The friction of the knee of a boy who stumbles and scratches his knee on the pavement is an example of
desirable friction D. undesirable friction
10. Why do we need to check the tires before taking a long trip? A. To ensure the safety of the passengers B. To save me
the good design of the car D. To know if there is a need for replacement
A​