Pregunta 1
Pregunta
What is accuracy?
Respuesta
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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
Pregunta 2
Pregunta
The smallest scale increment on a measuring device is the...
Respuesta
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Precision
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Accuracy
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Reliablity
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Uncertainty
Pregunta 3
Pregunta
What does the level of uncertainty depend on?
Respuesta
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Accuracy
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Precision
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Number of repeats
Pregunta 4
Pregunta
All experiments are uncertain
Pregunta 5
Pregunta
Which of these are systematic errors?
Pregunta 6
Pregunta
Which of the following does not apply to random errors?
Pregunta 7
Pregunta
Systematic errors can be totally eliminated
Pregunta 8
Pregunta
When adding or subtracting measured quantities, how do we find the uncertainty?
Respuesta
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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
Pregunta 9
Pregunta
When multiplying or dividing quantities, how do we find the uncertainty?
Respuesta
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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
Pregunta 10
Pregunta
What is a scalar quantity?
Pregunta 11
Pregunta
Which of these are scalar quantities?
Respuesta
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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
Pregunta 12
Pregunta
How do you combine scalar quantities?
Respuesta
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Add them
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Multiply them
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Resolve them
Pregunta 13
Pregunta
Momentum is a vector
Pregunta 14
Pregunta
Force is a scalar
Pregunta 15
Pregunta
How do you combine parallel vectors?
Pregunta 16
Pregunta
How do you combine vectors that are at random angles relative to each other?
Pregunta 17
Pregunta 18
Pregunta 19
Pregunta
What is the pulling force exerted by a string, chain, cable or similar object?
Respuesta
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Tension
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Normal reaction force
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Weight
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Upthrust
Pregunta 20
Pregunta
What is friction
Respuesta
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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
Pregunta 21
Pregunta
Which of these are fundamental forces?
Respuesta
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Strong Nuclear
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Weak Nuclear
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Gravitational
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Electromagnetic
Pregunta 22
Pregunta
In which direction does weight act?
Pregunta 23
Pregunta
In which direction does the normal reaction force act?
Pregunta 24
Pregunta
If an object is in equilibrium it is static
Pregunta 25
Pregunta
What does equilibrium mean?
Respuesta
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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
Pregunta 26
Pregunta
What is a moment?
Respuesta
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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
Pregunta 27
Pregunta
What is the principle of moments?
Respuesta
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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
Pregunta 28
Pregunta
A couple of forces is two forces that are equal and opposite and acting in the same line
Pregunta 29
Pregunta 30
Pregunta
What is pressure measured in?
Pregunta 31
Pregunta
Pressure = perpendicular force/area
Pregunta 32
Pregunta
Pressure = density x height x gravity