The force that two objects exert against each other to resist movement is known as what?

• A. Momentum
• B. Gravity
• C. Friction
• D. Inertia

Answer: (C)

Friction is the correct term for the force that two objects exert against each other to resist movement. This force acts when two surfaces come into contact, preventing or slowing down their relative motion. Friction is essential in everyday life, as it enables us to walk without slipping, allows vehicles to grip the road, and is fundamental in many mechanical operations.

Momentum refers to the quantity of motion an object has, dependent on its mass and velocity, and does not specifically relate to the resisting force between two objects. Gravity is the attractive force that pulls objects toward one another, particularly the force that pulls objects towards the Earth, but it does not inherently resist movement between surfaces. Inertia describes an object's tendency to resist changes in its state of motion; however, it does not describe the specific force that opposes sliding or movement between two surfaces. This distinction makes friction the most accurate choice in this context.