Question

question 10 of 25
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 decreases the force of friction.
b. it increases the force of friction.
c. it decreases the force of gravity.
d. it increases the force of gravity.

Explanation:

Oil in a car engine acts as a lubricant. Lubricants reduce the friction between moving parts. When there is no oil, the friction between engine parts (which are moving against each other) would be high. Oil fills the gaps between parts and allows them to move more smoothly, thus decreasing the force of friction. The force of gravity (\(F = mg\), where \(m\) is mass and \(g\) is acceleration due to gravity) is not affected by the presence or absence of oil in the engine as it depends on mass of the object and the gravitational acceleration.

Answer:

A. It decreases the force of friction.