Question

The frictional force exerted by fluids is called.
A.) Lift
B.) Drag
C.) Rolling friction
D.) Dynamic friction

Answer 1

Hint: The frictional force which liquids exert is called viscous friction. It is the tension between the fluid and the boundaries in motion that allows the fluid to shave. The force required for that action is a measure of the viscosity of the fluid.

Complete step-by-step answer:
Frictional force is the force produced by two surfaces which come into contact with each other and slide against each other. Such forces are primarily influenced by surface texture and volume of force. Frictional force intensity is influenced by the object's angle and location.

Lift is the aspect of a force exerted by a fluid moving across an object's surface, which is perpendicular to the direction of the oncoming flow. It conventionally operates in an upward direction to combat the force of gravity, but can act at right angles to the flow in either direction.

Rolling friction also known as rolling resistance is the resistive force which slows down a rolling ball or wheel movement. When a force or torque is applied to a stationary wheel, a small static rolling friction force prevents it from rolling.

Also known as Kinetic Friction dynamic friction is the friction between surfaces that move relative to each other. This friction is linked to a body 's motion slipping over another body and feeling dynamic friction recognizing opposing force.

As an object passes through a fluid medium such as air or water, pressure is exerted between them because of the force that interacts. The object has to pass through the water to travel forward in the water resulting in this sluggish motion of the object being pushed. This frictional force is called drag force, and this parallels the motion of the body in a fluid medium.

Hence option B is the correct answer and as per this frictional force exerted by fluids is called drag.

Note: For solving these types of questions we must remember the definition of each term being used in the given question. Then only we will be able to understand the question and answer it in correctly. Here the meaning of each term helped us to understand and answer the question.