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Beschreibung
Quiz von Nicole Saville, aktualisiert more than 1 year ago
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Erstellt von Nicole Saville
vor mehr als 9 Jahre
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Frage 1
Frage
What is accuracy?
Antworten
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How close the measurement is to the accepted value
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The degree to which you measure
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The skill of the experimenter
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The level of uncertainty
Frage 2
Frage
The smallest scale increment on a measuring device is the...
Antworten
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Precision
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Accuracy
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Reliablity
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Uncertainty
Frage 3
Frage
What does the level of uncertainty depend on?
Antworten
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Accuracy
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Precision
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Number of repeats
Frage 4
Frage
All experiments are uncertain
Antworten
- True
- False
Frage 5
Frage
Which of these are systematic errors?
Antworten
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experimental set up
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Human error
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faulty equipment
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inconsistent parallax error
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reaction time
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Zero errors on meters
Frage 6
Frage
Which of the following does not apply to random errors?
Antworten
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They reduce the accuracy
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The reduce the precision
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They can never be fully eliminated
Frage 7
Frage
Systematic errors can be totally eliminated
Antworten
- True
- False
Frage 8
Frage
When adding or subtracting measured quantities, how do we find the uncertainty?
Antworten
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Add the absolute uncertainty of each
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Add the percentage uncertainty of each
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Multiply the percentage uncertainties together
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Use the biggest absolute uncertainty
Frage 9
Frage
When multiplying or dividing quantities, how do we find the uncertainty?
Antworten
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Add the percentage uncertainty
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Multiply the percentage uncertainties
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Add the absolute uncertainties
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Double the uncertainty
Frage 10
Frage
What is a scalar quantity?
Antworten
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A quantity with magnitude only
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A quantity with magnitude and direction
Frage 11
Frage
Which of these are scalar quantities?
Antworten
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Distance
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Speed
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Velocity
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Current
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Acceleration
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Mass
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Density
Frage 12
Frage
How do you combine scalar quantities?
Antworten
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Add them
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Multiply them
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Resolve them
Frage 13
Frage
Momentum is a vector
Antworten
- True
- False
Frage 14
Frage
Force is a scalar
Antworten
- True
- False
Frage 15
Frage
How do you combine parallel vectors?
Antworten
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Add/subtract them
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Multiply/divide them
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Make them into a triangle and use pythagoras
Frage 16
Frage
How do you combine vectors that are at random angles relative to each other?
Antworten
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Add their magnitude and their angles
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Resolve them
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Use the parallelogram rule
Frage 17
Frage
Upthrust is...
Antworten
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The force on an object due to the difference in pressure when immersed in a fluid.
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The contact force of water
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The opposite of gravity
Frage 18
Frage
Weight is...
Antworten
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The force on an object due to gravity
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Gravity
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The mass of an object
Frage 19
Frage
What is the pulling force exerted by a string, chain, cable or similar object?
Antworten
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Tension
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Normal reaction force
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Weight
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Upthrust
Frage 20
Frage
What is friction
Antworten
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A force resisting the parallel movement of two surfaces in contact
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A force that slows down objects
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A force which prevents objects from sliding
Frage 21
Frage
Which of these are fundamental forces?
Antworten
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Strong Nuclear
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Weak Nuclear
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Gravitational
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Electromagnetic
Frage 22
Frage
In which direction does weight act?
Antworten
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Vertically downwards
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Perpendicularly downwards to the object
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Parallel to the surface
Frage 23
Frage
In which direction does the normal reaction force act?
Antworten
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Vertically upwards
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Perpendicular to the surface producing it
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Perpendicular to the object
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Parallel to the object
Frage 24
Frage
If an object is in equilibrium it is static
Antworten
- True
- False
Frage 25
Frage
What does equilibrium mean?
Antworten
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There are no forces acting on a body
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There is no resultant force
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A body is completely still
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A body is balanced
Frage 26
Frage
What is a moment?
Antworten
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The turning effect of a single force
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force x distance
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force x perpendicular distance
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weight x distance
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force/distance
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A pair of forces that are equal and opposite
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The forces on an object
Frage 27
Frage
What is the principle of moments?
Antworten
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The sum of the clockwise moments of an object = the sum of the anticlockwise moments of an object
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If an object is in equilibrium: the sum of clockwise moments = the sum of anticlockwise moments
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The sum of anticlockwise moments on an object can never fully equal the sum of clockwise moments on an object
Frage 28
Frage
A couple of forces is two forces that are equal and opposite and acting in the same line
Antworten
- True
- False
Frage 29
Frage
What is torque?
Antworten
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The moment of a couple
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Fd
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Fd/2
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The resultant of two perpendicular forces
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The distance of forces from the pivot
Frage 30
Frage
What is pressure measured in?
Antworten
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Nm^-2
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Nm^2
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N/m
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Pa
Frage 31
Frage
Pressure = perpendicular force/area
Antworten
- True
- False
Frage 32
Frage
Pressure = density x height x gravity
Antworten
- True
- False
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