chapters 10-14
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| show | covers situations in which all forces acting on the body are balanced (in equilibrium)
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| dynamics | show 🗑
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| show | branch of mechanics that considers the forces that produce or change motion
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| show | single quantities (size or amount
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| show | double quantities (magnitude and direction)
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| show | the act or process of changing place or position with respect to some reference object
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| show | object is translated as a whole from one location to another
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| rectilinear motion- | show 🗑
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| show | refers to all curved translatory movement (moves in curved pathway)
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| show | when an object acting as a radius moves about a fixed point.
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| reciprocating motion | show 🗑
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| external factors modifying motion- | show 🗑
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| internal/ anatomical factors modifying motion- | show 🗑
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| speed equation= | show 🗑
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| show | displacement/time
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| mean acceleration= | show 🗑
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| a= | show 🗑
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| show | at
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| t= | show 🗑
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| factors that control the range of a projectile: | show 🗑
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| show | C=2(pi)r
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| show | that which pushes or pulls through direct mechanical contact or through the force of gravity to alter the motion of an object
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| what kind of quantity is force? | show 🗑
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| force possess both... | show 🗑
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| show | muscle forces that act on various structures of the body
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| external forces- | show 🗑
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| show | muscle fibers
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| show | point at which force is applied to object
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| show | the patella increases angle of pull and increases rotary component
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| show | body continues in its state of rest of uniform motion unless an unbalanced force acts upon it
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| show | F=mass x acceleration, acceleration is directly proportional to force causing it and inversely proportional to mass of object
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| show | Ft= m(v-u) product of force and time is applied
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| momentum= | show 🗑
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| What are linear forces? give an example. | show 🗑
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| show | forces acting at the same point of application but at different angles. ex) several fball players blocking each other in blocking situation
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| show | forces are not in the same line but parallel to each other act at different points on body ex) holding a 10 N weight in hand with arm flexed at 90 degrees
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| show | in any system where forces act on each other, the momentum is constant
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| show | 1) gravity 2) reaction forces 3) weight 4) friction 5) elasticity and rebound 6) fluid forces
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| show | the force that opposes efforts to slide or roll one body over another
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| friction is proportional to? | show 🗑
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| what is elasticity? | show 🗑
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| show | e= the square root of bounce height/ drop height
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| show | the elasticity of the striking object and the friction between the two surfaces
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| show | smaller angle of reflection
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| balls thrown with topspin will rebound from horizontal surfaces lower and with more horizontal velocity than that with which they struck the surface | show 🗑
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| balls hitting a horizontal surface with backspin rebound at | show 🗑
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| a ball with no spin will.. | show 🗑
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| show | develop greater topspin when rebounding
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| show | if fluid around an object is smooth and unbroken
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| drag force | show 🗑
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| Bernoulli's principle- | show 🗑
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| eccentric force- | show 🗑
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| show | the turning effect of an eccentric force, or moment of force
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| torque equation= | show 🗑
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| show | the perpendicular distance between the force vector and the axis
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| force couple- | show 🗑
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| show | resultant torques of a force system must be equal to the sum of the torques of the individual forces of the system about the same point.
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| What is a lever? | show 🗑
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| show | fixed point about which a lever turns when force applied
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| effort arm (EA)- | show 🗑
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| show | the perpendicular distance between the fulcrum and the line of resistance force
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| show | axis lies between the effort and the resistance
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| show | balance
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| show | resistance lies between axis and effort; EA always longer than RA
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| advantage of second class levers- | show 🗑
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| show | ROM sacrificed
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| third class levers- | show 🗑
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| principle of levers- | show 🗑
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| show | EAR
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| 2nd class lever abbreviation | show 🗑
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| 3rd class lever abbreviation | show 🗑
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| show | head on neck, forearm when being extended by triceps against resistance
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| anatomical examples of second class lever- | show 🗑
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| show | wheel barrow, door handle, nutcracker
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| anatomical examples of third class lever | show 🗑
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| show | screen door with spring closing
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| principle of levers equation= | show 🗑
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| show | ability to magnify force
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| mechanical advantage (MA)= | show 🗑
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| show | EA/RA
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| show | I = sum mr^2
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| angular momentum= | show 🗑
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| show | acted upon by external torques
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| show | an increase in angular velocity
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| show | the balance point or the point about which a body would balance without tendency to rotate
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| show | body build, age, and sex
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| show | at 55% of standing height
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| show | at 57% standing height
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| show | multiply rev/ sec x 360 then divide by 57.3
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| convert radians per second to degrees per second | show 🗑
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