Question

if you do not have oil in your cars engine, the parts that rub together in the engine get very hot. what does the oil do?
a. it increases the force of friction.
b. it decreases the force of gravity.
c. it decreases the force of friction.
d. it increases the force of gravity.

Explanation:

Engine oil lubricates engine - parts. Lubrication reduces friction between moving parts. So, oil decreases the force of friction.

Answer:

C. It decreases the force of friction.