Statics

Descripción

Test sobre Statics, creado por Nicole Saville el 27/10/2014.
Nicole Saville
Test por Nicole Saville, actualizado hace más de 1 año
Nicole Saville
Creado por Nicole Saville hace alrededor de 10 años
31
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Resumen del Recurso

Pregunta 1

Pregunta
What is accuracy?
Respuesta
  • How close the measurement is to the accepted value
  • The degree to which you measure
  • The skill of the experimenter
  • The level of uncertainty

Pregunta 2

Pregunta
The smallest scale increment on a measuring device is the...
Respuesta
  • Precision
  • Accuracy
  • Reliablity
  • Uncertainty

Pregunta 3

Pregunta
What does the level of uncertainty depend on?
Respuesta
  • Accuracy
  • Precision
  • Number of repeats

Pregunta 4

Pregunta
All experiments are uncertain
Respuesta
  • True
  • False

Pregunta 5

Pregunta
Which of these are systematic errors?
Respuesta
  • experimental set up
  • Human error
  • faulty equipment
  • inconsistent parallax error
  • reaction time
  • Zero errors on meters

Pregunta 6

Pregunta
Which of the following does not apply to random errors?
Respuesta
  • They reduce the accuracy
  • The reduce the precision
  • They can never be fully eliminated

Pregunta 7

Pregunta
Systematic errors can be totally eliminated
Respuesta
  • True
  • False

Pregunta 8

Pregunta
When adding or subtracting measured quantities, how do we find the uncertainty?
Respuesta
  • Add the absolute uncertainty of each
  • Add the percentage uncertainty of each
  • Multiply the percentage uncertainties together
  • Use the biggest absolute uncertainty

Pregunta 9

Pregunta
When multiplying or dividing quantities, how do we find the uncertainty?
Respuesta
  • Add the percentage uncertainty
  • Multiply the percentage uncertainties
  • Add the absolute uncertainties
  • Double the uncertainty

Pregunta 10

Pregunta
What is a scalar quantity?
Respuesta
  • A quantity with magnitude only
  • A quantity with magnitude and direction

Pregunta 11

Pregunta
Which of these are scalar quantities?
Respuesta
  • Distance
  • Speed
  • Velocity
  • Current
  • Acceleration
  • Mass
  • Density

Pregunta 12

Pregunta
How do you combine scalar quantities?
Respuesta
  • Add them
  • Multiply them
  • Resolve them

Pregunta 13

Pregunta
Momentum is a vector
Respuesta
  • True
  • False

Pregunta 14

Pregunta
Force is a scalar
Respuesta
  • True
  • False

Pregunta 15

Pregunta
How do you combine parallel vectors?
Respuesta
  • Add/subtract them
  • Multiply/divide them
  • Make them into a triangle and use pythagoras

Pregunta 16

Pregunta
How do you combine vectors that are at random angles relative to each other?
Respuesta
  • Add their magnitude and their angles
  • Resolve them
  • Use the parallelogram rule

Pregunta 17

Pregunta
Upthrust is...
Respuesta
  • The force on an object due to the difference in pressure when immersed in a fluid.
  • The contact force of water
  • The opposite of gravity

Pregunta 18

Pregunta
Weight is...
Respuesta
  • The force on an object due to gravity
  • Gravity
  • The mass of an object

Pregunta 19

Pregunta
What is the pulling force exerted by a string, chain, cable or similar object?
Respuesta
  • Tension
  • Normal reaction force
  • Weight
  • Upthrust

Pregunta 20

Pregunta
What is friction
Respuesta
  • A force resisting the parallel movement of two surfaces in contact
  • A force that slows down objects
  • A force which prevents objects from sliding

Pregunta 21

Pregunta
Which of these are fundamental forces?
Respuesta
  • Strong Nuclear
  • Weak Nuclear
  • Gravitational
  • Electromagnetic

Pregunta 22

Pregunta
In which direction does weight act?
Respuesta
  • Vertically downwards
  • Perpendicularly downwards to the object
  • Parallel to the surface

Pregunta 23

Pregunta
In which direction does the normal reaction force act?
Respuesta
  • Vertically upwards
  • Perpendicular to the surface producing it
  • Perpendicular to the object
  • Parallel to the object

Pregunta 24

Pregunta
If an object is in equilibrium it is static
Respuesta
  • True
  • False

Pregunta 25

Pregunta
What does equilibrium mean?
Respuesta
  • There are no forces acting on a body
  • There is no resultant force
  • A body is completely still
  • A body is balanced

Pregunta 26

Pregunta
What is a moment?
Respuesta
  • The turning effect of a single force
  • force x distance
  • force x perpendicular distance
  • weight x distance
  • force/distance
  • A pair of forces that are equal and opposite
  • The forces on an object

Pregunta 27

Pregunta
What is the principle of moments?
Respuesta
  • The sum of the clockwise moments of an object = the sum of the anticlockwise moments of an object
  • If an object is in equilibrium: the sum of clockwise moments = the sum of anticlockwise moments
  • The sum of anticlockwise moments on an object can never fully equal the sum of clockwise moments on an object

Pregunta 28

Pregunta
A couple of forces is two forces that are equal and opposite and acting in the same line
Respuesta
  • True
  • False

Pregunta 29

Pregunta
What is torque?
Respuesta
  • The moment of a couple
  • Fd
  • Fd/2
  • The resultant of two perpendicular forces
  • The distance of forces from the pivot

Pregunta 30

Pregunta
What is pressure measured in?
Respuesta
  • Nm^-2
  • Nm^2
  • N/m
  • Pa

Pregunta 31

Pregunta
Pressure = perpendicular force/area
Respuesta
  • True
  • False

Pregunta 32

Pregunta
Pressure = density x height x gravity
Respuesta
  • True
  • False
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