What is a resistive force?

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The question asks: What is a resistive force?
Option a: 'Force acts on object because it stops by a wall' This description is more about a contact force that halts motion against a barrier, but it does not define resistive force in general terms, which includes opposing motion through a medium, not just stopping at a wall.
Option b: 'Force between two objects crashing to each other' This describes an impact or contact force during a collision, not specifically the resistive forces that oppose motion in a medium or along a surface under frictional influence.
Option c: 'Friction force on an object moving in a gas or liquid' This matches the typical physics definition of a resistive force: a friction-like resistance arising from the interaction with a medium (gas or liquid) that opposes motion, such as drag or viscous resistance, and it is indeed a resistive force acting on moving bodies in fluids.
Option d: 'Friction force on an object moving on an inclined plane' While this is a frictional force, it is a specific case of friction on a plane, not a general resistive force arising from a medium; resistive forces in fluids are more inclusive and appropriately described by option c.
In summary, the core idea of a resistive force is an opposing force encountered while an object moves through a medium, which is best captured by option c. The other options describe particular scenarios or forces that do not embody the general concept of resistive forces acting in a medium.

UCIC 202503 PHYS101 Quiz 2

What is a resistive force?

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