Quizzes

Created by gnwatson

Power is defined as
The rate of doing work

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TermDefinition
Power is defined as
The rate of doing work
The form of energy associated with the stiffness and deformability of an object is called
Strain Energy
Mechanical work is performed in all of these types of muscle activity except for; isometric, concentric, eccentic
Isometric
In the equation for calculating strain energy, the x symbolizes
The amount of deformation
Kinetic Energy is the energy
Due to motion
Strain Energy is the energy
Due to deformation
During an arm wrestling match, your opponent is winning. She is slowly pushing your arm down toward the table. If you are doing any mechanical work against your opponent, the work is
Negative
During the pitching motion, a baseball pitcher exerted an average horizontal force of 80 N against the 0.15 kg baseball while moving it through a horizontal displacement of 2 m before release. The work performed by the pitcher on the baseball
Was positive work
Strain energy is most important in which of the following sports; swimming, pole vaulting, bowling, ski jumping, field hockey
Pole Vaulting
The vertical force that always acts upward is
Buoyant Force
As relative velocity increases, the fluid forces acting on an object increase linearly, true or false?
False
The principle or law used to describe life is called
Bernoulli's Principle
Which shape is most conductive to optimizing lift
Foil
The ratio of the weight of an object to the weight of an equal volume of water is
Specific Gravity
Buoyant force is present whether the object is at rest or is moving relative to the fluid, true or false
True
A lift force can be directed upward, downward, or in any direction that is perpendicular to the fluid flow, true or false
True
If you are kicking a corner kick in soccer and want the ball to curve to the left, what is the required direction of spin of the ball
To the left
Why are there dimples on a golf ball
To create a thin, turbulent layer of fluid that reduces drag
World class cycling teams create a single file "pack" and take turns as to which cyclist is in the lead. All the other pack members fall in closely behind the lead. Why do they do this
To reduce drag
When applying rigid-body mechanics to the study of human beings, what assumption is made
The body does not deform by bending, stretching, or compressing
When a stretched material does not return to its original shape, it is called
Plastic
Deformation divided by original length
Strain
What force exerts a pull on the body acted uopon
Tension
Increasing the magnitude of force acting on a surface increases the amount of stress acting on the surface, true or false
True