Quiz Questions Over Gravitational Forces

A coach is observing a players volleyball spike during a practice would be engaged in what type of analysis?

Which analysis approach breaks the body down into section with specific movement steps?

Which of the follwing would bbe diff for the same object on earth vs the moon

• A.

  Mass

• B.

  Density

• C.

  Weight

• D.

  Kg

A vector quantity must be described with a magnitude and what?

With the left arm held out to the side and elbow fully extended and a coordinate sys origin at the elbow joint the hand could be said to have a polar coord of (30 cm, 0 deg) which of the following could rep. the coord. of the hand with the elbow flexed to 90 degrees

• A.

  30 cm 0deg

• B.

  0 deg, 30 cm

• C.

  30 cm, 90 deg

• D.

  0 cm 90 deg

A 2N force vector  point up and to the right forming on angle of 45 with the horiz another 2N force vector points up and to the left also forming a 45 deg angle above the horiz what is the direction of the sum of these two vectors

What is the name of the angle formed by the intersection of a line from the anterior superior iliac spine of the pelvis and the center of the patella and a line from the center of the patella to the tib tube?

Which of the following is NOT true

• A.

  Motion can exist without a force

• B.

  There must be a force to change a systems motion

• C.

  Force possess the capability to change motion

• D.

  Force is req to maintian a constant state of motion

Which of the following is NOT a scalar quantity

Which equation rep the relationship btw the sides a and b of a right triangle and the hypotnuse r?

The SI unit of force is the newton

• A.

  True

• B.

  False

What are the 5 prop. of force that can be addressed through a graphical representation

When resolving muscle force vectors there are 3 primary components

List 5 of the diff types of loading assoicuated with traumatic injuries plus name the equation that calculates the stress/strain curves associated with vairous types of materials

What are the 2 types of strain associated with poissons ratio

List 4 types of field forces 

Paschale's law states that pressure applied to a fluid is transmitted undiminshed to every point of a fluid and to the walls of the container

• A.

  True

• B.

  False

The measure of pressure doesnt account for surface area

• A.

  True

• B.

  False

The coefficient of restitution is the same thing as the coefficient of elasticity

• A.

  True

• B.

  False

The coefficient of static and kinetic friction are represented by the same mathmatical symbol

• A.

  True

• B.

  False

Newton created 4 laws of motion and they were called newtons 1 2 3 and 4 laws

• A.

  True

• B.

  False

If a material is visoelastic its deformation is affected by the loading direction (tension/compression/shear)

• A.

  True

• B.

  False

A rubberband has a much higher young's modulus than a human bone such as a femur

• A.

  True

• B.

  False

Stress and pressure have the same units

• A.

  True

• B.

  False

All bodies are attracted to each other to some degree due to gravitational forces

• A.

  True

• B.

  False

If a person exerts a force on the earth that causes that person to jump 1, the earth will also move 1m as an equal and opposite reaction

• A.

  True

• B.

  False

When adding vectors the cummalative law applies such that a+b = b+a

• A.

  True

• B.

  False

It is impossible to graphically add more than 2 vectors at the same time

• A.

  True

• B.

  False

The sum of 4 cm and 48 kg is 52 kg-cm

• A.

  True

• B.

  False

Of the four fundamental field forces which is relatively the weakest

• A.

  Strong nuclear force

• B.

  Electromagnetic

• C.

  Weak nuclear force

• D.

  Gravitational force

The test of gross motor dev #2 is an example of a component approach to qualitative motion analysis?

• A.

  True

• B.

  False

A cup of coffee sits in the cup holder of a moving car which of newtons laws best explains why the coffee sloshes forward when the car slows down 

Which of the following statements is true about drag force?

• A.

  Its parallel component of dyamic fluid force

• B.

  It is the perp component of dynamic fluid force

• C.

  It is the resultant of dynamic fluid force

• D.

  It is equal and opp of the resultant of dynamic fluid force

A ball dropped from a height of 4 m onto a floor bounces to a height of 1m what is the COR of the ball and floor

• A.

  0.25

• B.

  0.5

• C.

  1

• D.

  4

The total area under the stress strain curve is a measure of what

• A.

  Toughness

• B.

  Ductility

• C.

  Elasticity

• D.

  Failure strain

A bone that has fractured has encountered stress in which region of the stress strain curve

• A.

  Ductile region

• B.

  Elastic

• C.

  Plastic

• D.

  Compressive

Which of the following explains how much an intervertabral disc will buld radially when a compressive load is applied

• A.

  Youngs modulus

• B.

  Poissons ratio

• C.

  Archemieds principle

• D.

  Newtons 1st law

Which of the following could have units of mm/mm

• A.

  Force

• B.

  Pressure

• C.

  Stress

• D.

  Strain

How does the atmosphere pressure at the top of a tall maintain compare to the atmosphere pressure at sear level?

• A.

  The atmospheric pressure at the top is less

• B.

  The atmospheric pressure is identical

• C.

  The atmospheric pressure is greater

• D.

  The atmospheric pressure varies substantially and is sometimes less and sometimes greater

A person steps off a rock with a downward force of 800n applied over a cross sec area of 2 cm how much pressure was experienced?

• A.

  1600 n cm2

• B.

  400 n cm2

• C.

  800 n cm2

• D.

  0.0025 n cm2

The friction force between a box and a wooden floor depends on all the following EXCEPT

• A.

  The material prop. of the box

• B.

  The material prop of the floor

• C.

  The area of the box in contact with the floor

• D.

  The weight of the box

Which of the following rep. the polar coordinates of a point whose cartesian coord. are (2,2)?

• A.

  2,90

• B.

  4,90

• C.

  2.83,45

• D.

  2.83,0

A single vector can be resolved into what?

• A.

  Contrast vectors

• B.

  Complex vectors

• C.

  Complimentary vectors

• D.

  Component vectors

What are the 5 properties of force that can be addressed through a graphical representation

A quality that possesses only a magnitude but has  no particular direction associated with it is called a?

Which of the following would have the largest horizontal force component?

• A.

  A force with 400 n applied to a soccer ballat an angle of 30 deg from the horiz

• B.

  A force of 300 n app to a soccer ball at an angle of 30 deg from the horiz

• C.

  A force of 400 n appled to a soccer ball at an angle of 70 deg from horiz

• D.

  A force of 600 n applied to a soccer ball at an angle of 30 deg from the horiz

A vector with a magnitude of 20 N points to the right 32 deg up fromo the horiz which of the following charecteristizes the magnitude of that vectors horiz component

• A.

  (20 N) cos( 32)

• B.

  1/ tan (32)

• C.

  20 N (sin (32)

• D.

  Cos (32)/20N

Gravity measured at the equator in the far east is ____ m/sec squared

• A.

  9.83

• B.

  9.87

• C.

  9.78

The _____ of a system is directly prop to the sum of the forces (or net force) acting upon it

• A.

  Acceleration

• B.

  Displacement

• C.

  Mass

• D.

  Velocity

Which of newtons laws explains the principle of the ground reaction force measured in biomechnics labs when a person stands or walks over a force patform in the floor?

• A.

  1st

• B.

  2nd

• C.

  3rd

• D.

  Newtons law of universal gravitation