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