Quizzes
Created by gnwatson
| Term | Definition |
|---|---|
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 |