Answer:

A. Friction always cause undesirable effect

Explanation:

correct nio lang kung mali

Answer:

c.greater work is done in pushing object because of friction

Explanation:

Friction is a force that resists relative motion between two surfaces in contact. ... In other applications, such as operation of engines or equipment with bearings and gears, friction is undesirable because it causes wear and generates heat, which frequently lead to premature failure.

friction will be negative because the force is applied in the opposite direction as the motion, and will decrease the initial energy, giving us a Final Energy result that is less than the initial energy because energy is lost to friction.

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