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Statics

Description

Quiz on Statics, created by Nicole Saville on 27/10/2014.
Nicole Saville
Quiz by Nicole Saville, updated more than 1 year ago
Nicole Saville
Created by Nicole Saville about 10 years ago
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Resource summary

Question 1

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

Question 2

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

Question 3

Question
What does the level of uncertainty depend on?
Answer
  • Accuracy
  • Precision
  • Number of repeats

Question 4

Question
All experiments are uncertain
Answer
  • True
  • False

Question 5

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

Question 6

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

Question 7

Question
Systematic errors can be totally eliminated
Answer
  • True
  • False

Question 8

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

Question 9

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

Question 10

Question
What is a scalar quantity?
Answer
  • A quantity with magnitude only
  • A quantity with magnitude and direction

Question 11

Question
Which of these are scalar quantities?
Answer
  • Distance
  • Speed
  • Velocity
  • Current
  • Acceleration
  • Mass
  • Density

Question 12

Question
How do you combine scalar quantities?
Answer
  • Add them
  • Multiply them
  • Resolve them

Question 13

Question
Momentum is a vector
Answer
  • True
  • False

Question 14

Question
Force is a scalar
Answer
  • True
  • False

Question 15

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

Question 16

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

Question 17

Question
Upthrust is...
Answer
  • 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

Question 18

Question
Weight is...
Answer
  • The force on an object due to gravity
  • Gravity
  • The mass of an object

Question 19

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

Question 20

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

Question 21

Question
Which of these are fundamental forces?
Answer
  • Strong Nuclear
  • Weak Nuclear
  • Gravitational
  • Electromagnetic

Question 22

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

Question 23

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

Question 24

Question
If an object is in equilibrium it is static
Answer
  • True
  • False

Question 25

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

Question 26

Question
What is a moment?
Answer
  • 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

Question 27

Question
What is the principle of moments?
Answer
  • 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

Question 28

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

Question 29

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

Question 30

Question
What is pressure measured in?
Answer
  • Nm^-2
  • Nm^2
  • N/m
  • Pa

Question 31

Question
Pressure = perpendicular force/area
Answer
  • True
  • False

Question 32

Question
Pressure = density x height x gravity
Answer
  • True
  • False
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