Chp. 13 Fluid Forces

What is the SI unit of pressure?

• newton

• liter

• kilogram

• pascal

Why do snowshoes make it easier to walk on snow?

• They float on top of the snow.

• They provide more traction than regular shoes.

• They reduce the pressure by spreading out your weight over a larger surface area.

• They create a layer of air under your shoes.

What is Bernoulli's Principle?

• The faster a fluid moves, the less pressure it exerts.

• The pressure in a fluid at a given depth is constant, and it is exerted equally in all directions.

• The faster a fluid moves, the more pressure it exerts.

• An object at rest tends to stay at rest.

When pressure is applied to a confined fluid, the increase in pressure is transmitted equally to all parts of the fluid. This is also known as which principle?

• Pascal's principle

• Newton's principle

• Fitzgibbons' principle

• Bernoulli's principle

What happens to atmospheric pressure as elevation increases?

• It increases

• It decreases

• It remains the same

• It fluctuates

As an object descends into a body of water, what happens to the water pressure on that object?

• It increases

• It decreases

• It remains the same

• It fluctuates

What is the buoyant force?

• The force that makes an object feel lighter

• The force exerted by the individual particles in a fluid

• The force that causes an object to sink

• The force that opposes the force of gravity

What is Archimedes' Principle?

• The buoyant force acting on a submerged object is equal to the weight of the fluid the object displaces

• The faster a fluid moves, the less pressure it exerts

• The change in pressure is transmitted equally to all parts of a confined fluid

• The increase in pressure is transmitted to another part of the confined fluid

How is lift produced in the wing of an airplane?

• By increasing the pressure above the wing and decreasing the pressure below the wing

• By decreasing the pressure above the wing and increasing the pressure below the wing

• By increasing the pressure above and below the wing

• By decreasing the pressure above and below the wing

What is a system that multiplies force by transmitting pressure from a small surface area through a confined fluid to a larger surface area.

• hydraulic system
• archimedes system
• pressure system
• bernoulli effect