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Flotation
Centre of Buoyancy
Fluid Resistance
The Magnus Effect
Random
100
It is to maintain a stationary position on the surface of the water
What is to float
100
This is the centre of gravity of a volume of water diplaced by an object when it is immersed in that water.
What is centre of buoyancy
100
The component of a force that acts at right angles to drag.
What is lift
100
This explains why spinning objects such as cricket and golf balls deviate from their normal flight paths
What is the Magnus Effect
100
Fluid mechanics is a branch of mechanics concerned with the properties of objects moving through...
What is air or liquid
200
It refers to a body or objects mass per unit of volume
What is density
200
The centre of buoyancy and the centre of gravity are always aligned in the same manner for all people. True or False
What is False
200
The force that opposes the forward motion of a body or object, reducing its speed or velocity.
What is drag
200
This occurs when a ball or object rotates forward on its horizontal axis causing it to drop sharply
What is top spin
200
This type of drag effects the performance of a golfball
What is surface drag
300
It is the average of all the specific densities of body components such as bones, teeth and lungs
What is average total body density
300
This area of the body would have the lesser density if the legs tend to sink when attempting to float
What is upper body
300
This type of spin causes an object to lift
What is backspin
300
This type of drag is lessened when a person skiing tucks into a crouch position to go faster down the hill
What is profile drag
400
This occurs when the water displaced by the object is heavier than the object itself.
What is float
400
This organ tends to draw the centre of buoyancy towards the chest
What is lungs
400
This type of drag refers to the thin film of the fluid medium sticking to the surface area of the body or object through which it is moving
What is surface drag or skin friction
400
This feature of a cricket ball allows for it to swing
What is seam, smooth side or rough side of the ball
400
These two sports rely heavily on topspin or backspin. Name one
What is tennis or table tennis
500
An object is said to be this when the upward force on the object is greater or equal to the body or object
What is buoyant
500
This lies directly below the centre of buoyancy for floating object.
What is the centre of mass (or gravity)
500
These can each have an impact on amount of drag experienced by an object. Must name 3 of the 4
What is fluid denisty (air vs water), shape (is it streamlined, surface (smooth vs rough), and size of frontal area (large or small)
500
This is the area where there is low pressure when a ball is experiencing topspin
What is the area between the ball and the ground
500
A life jacket makes one more buoyant becasue it does this.
What is lowers the density or mass per unit of volume of the person.