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A. write letter of the correct answer

1. what is NOT true about friction?
a. it is a force that always acts opposite to the abjects's natural motion
b. it is a force that acts in the same direction as the object's motion
c. it is a restarting force which means it prevents movement
d. friction is a contract force

2. which of the following best describes friction?
a. friction can be both an advantage and a disadvantage
b. friction cannot be reduced or increased
c. friction is a total disadvantage
d. friction is a total advantage

3. how can friction increased?
a. by using a larger area on contact
b. by applying a heavy weight
c. by using a smooth surface
d. by applying a light weight

4. which of th following materials DO NOT help reduce friction?
a. ball bearings or wheels
b. grease
c lubricant
d. sand

5. which of the following DO NOT help increase friction
a. using rough surfaces
b. increasing the weight
c. using rubber
d. applying wax

pls be serious on answering these questions. i really need it now so thank you in advance! ​