What force is always perpendicular to the motion?

What force is always perpendicular to the motion?

Correct answer: Normal force always acts perpendicular to the contact surface. It can act counter to gravity or to any other force that pushes an object against a surface. Think of normal force as the force that keeps a surface solid; without normal force, an object would pass right through a surface.

What are the forces acting on static fluid?

In the case on an object at stationary equilibrium within a static fluid, the sum of the forces acting on that object must be zero. As previously discussed, there are two downward acting forces, one being the weight of the object and the other being the force exerted by the pressure from the fluid above the object.

When a force acts parallel to the surface of an object it exerts a?

Normal Stress and 2. Shear Stress. When a force acts perpendicular (or “normal”) to the surface of an object, it exerts a normal stress. When a force acts parallel to the surface of an object, it exerts a shear stress.

What is force exerted by a fluid?

The force exerted by the liquid is always normal to the surface in contact with the liquid. . The total normal force exerted by a liquid at rest on a surface in contact with it is called fluid thrust. Pressure in fluids : A solid exerts pressure on a surface due to its weight.

Why is the Lorentz force perpendicular?

The superficial answer is simply that the Lorentz (magnetic) force is proportional to v×B, where v is the particle velocity and B is the magnetic field. Since the vector cross product is always at right angles to each of the vector factors, the force is perpendicular to v.

Is force always perpendicular to velocity and magnetic field?

The force exerted on a charge moving in a magnetic field is always perpendicular to both the velocity and the field. Any force perpendicular to the velocity can not change the speed (or the kinetic energy). All it can do is make the charge change direction.

What is meant by static fluid?

Fluid statics is the branch of fluid mechanics that studies incompressible fluids at rest. It encompasses the study of the conditions under which fluids are at rest in stable equilibrium as opposed to fluid dynamics, the study of fluids in motion. A fluid is a state of matter that yields to sideways or shearing forces.

What do you mean by fluid statics and fluid dynamics?

Fluid statics or hydrostatics is the branch of fluid mechanics that studies fluids at rest. It embraces the study of the conditions under which fluids are at rest in stable equilibrium; and is contrasted with fluid dynamics, the study of fluids in motion.

What can you say about the force exerted by the object and the direction of the object motion?

The law of action-reaction (Newton’s third law) explains the nature of the forces between the two interacting objects. According to the law, the force exerted by object 1 upon object 2 is equal in magnitude and opposite in direction to the force exerted by object 2 upon object 1.

Why is the force of a fluid always perpendicular to the surface?

The facts that the force exerted by a fluid when static is always perpendicular to the surface means that other non perpendicular force components are cancel out with each other.

Does a static fluid transmit only normal force?

Yes, a static fluid transmits only a normal force that can be represented by pressure. That is, the fact that the fluid at rest interacts with the wall only by pressure is a consequence of the properties of the fluid, but not the cause.

What happens to pressure when fluid does not move?

It is true that when the fluid does not move (static conditions), pressure forces are transmitted equally in all directions and, moreover, they are perpendicular to any surface the fluid interacts with, real or virtual.

How does hydrostatic force act on an inclined plane?

Hydrostatic Force on a Plane Surface. Consider an inclined plane submerged in a static fluid as shown in the figure. The resultant force F R is acting perpendicular to the plane since no shear force is present when the fluid is at rest. F R has a line of action that passes through the point (x cp , y cp), which is called the center of pressure.