Statics

Descrição

Quiz sobre Statics, criado por Nicole Saville em 27-10-2014.
Nicole Saville
Quiz por Nicole Saville, atualizado more than 1 year ago
Nicole Saville
Criado por Nicole Saville aproximadamente 10 anos atrás
31
0

Resumo de Recurso

Questão 1

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

Questão 2

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

Questão 3

Questão
What does the level of uncertainty depend on?
Responda
  • Accuracy
  • Precision
  • Number of repeats

Questão 4

Questão
All experiments are uncertain
Responda
  • True
  • False

Questão 5

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

Questão 6

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

Questão 7

Questão
Systematic errors can be totally eliminated
Responda
  • True
  • False

Questão 8

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

Questão 9

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

Questão 10

Questão
What is a scalar quantity?
Responda
  • A quantity with magnitude only
  • A quantity with magnitude and direction

Questão 11

Questão
Which of these are scalar quantities?
Responda
  • Distance
  • Speed
  • Velocity
  • Current
  • Acceleration
  • Mass
  • Density

Questão 12

Questão
How do you combine scalar quantities?
Responda
  • Add them
  • Multiply them
  • Resolve them

Questão 13

Questão
Momentum is a vector
Responda
  • True
  • False

Questão 14

Questão
Force is a scalar
Responda
  • True
  • False

Questão 15

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

Questão 16

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

Questão 17

Questão
Upthrust is...
Responda
  • 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

Questão 18

Questão
Weight is...
Responda
  • The force on an object due to gravity
  • Gravity
  • The mass of an object

Questão 19

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

Questão 20

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

Questão 21

Questão
Which of these are fundamental forces?
Responda
  • Strong Nuclear
  • Weak Nuclear
  • Gravitational
  • Electromagnetic

Questão 22

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

Questão 23

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

Questão 24

Questão
If an object is in equilibrium it is static
Responda
  • True
  • False

Questão 25

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

Questão 26

Questão
What is a moment?
Responda
  • 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

Questão 27

Questão
What is the principle of moments?
Responda
  • 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

Questão 28

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

Questão 29

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

Questão 30

Questão
What is pressure measured in?
Responda
  • Nm^-2
  • Nm^2
  • N/m
  • Pa

Questão 31

Questão
Pressure = perpendicular force/area
Responda
  • True
  • False

Questão 32

Questão
Pressure = density x height x gravity
Responda
  • True
  • False

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