Forces in Fluids Review

Front

What is Bernoulli's principle?

Back

Bernoulli's principle states that as the speed of a fluid increases, its pressure decreases. This principle explains how lift is generated on an airplane wing.

Front

What happens to the speed of wind above and below a curved blade according to Bernoulli's principle?

Back

High speed wind travels above the blade and low speed wind travels below the blade, creating a pressure difference that generates lift.

Front

What is buoyant force?

Back

Buoyant force is the upward force exerted by a fluid on an object submerged in it, caused by differences in fluid pressure.

Front

How do you calculate buoyant force?

Back

Buoyant force can be calculated by measuring the weight of the fluid displaced by the object.

Front

If an object weighs 20 N and displaces water weighing 15 N, what is the buoyant force?

Back

The buoyant force is 15 N.

Front

What is the relationship between weight and buoyant force for an object to float?

Back

For an object to float, its weight must be equal to the buoyant force acting on it.

Front

What happens when a submarine floods its ballast tanks?

Back

Flooding the ballast tanks causes the submarine to sink, not float.

Front

What is the effect of fluid pressure on buoyant force?

Back

Buoyant force is caused by differences in fluid pressure acting on the top and bottom surfaces of an object.

Front

If an object displaces a volume of water weighing 25 N, what is the buoyant force if the object weighs 40 N?

Back

The buoyant force is 25 N.

Front

True or False: Buoyant force can be greater than the weight of the object.

Back

True, if the buoyant force is greater than the weight of the object, it will rise.