Statistics for AQA - A Level Physics - Mechanics and Materials #3

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Answer Stats

Hint	Answer	% Correct
What is the density of water	1000kgm⁻³	0%
What is a compressive force	A force that reduces the length of an object	0%
Define Tensile Strain	Change in length per unit original length	0%
What is the effect of connecting two identical springs in parallel	Double the stiffness/k	0%
State Hooke's Law equation	F = -kx	0%
Give the equation for Energy stored in a stretched spring	½ F×∆L	0%
What is the effect of connecting two identical springs in series	Halve the stiffness/k	0%
Base units equivalent to a Joule	kg m² s⁻²	0%
Define density	Mass per unit volume	0%
Define Plastic deformation	Material remains permanently deformed after the load is removed.	0%
Define Elastic deformation	Material returns to its original shape when the load is removed	0%
Give the equation for Change in gravitational potential energy	m g ∆h	0%
Give the equation for Kinetic Energy	½ m v²	0%
The units of stress	Pascals (Pa) or Nm^-2	0%
What is the Material property measured by the Young's Modulus	Stiffness	0%
Define Young's Modulus	Stress / Strain (within the limit of proportionality)	0%
Define Tensile stress	Tensile force divided by cross-sectional area	0%
Define Hooke's Law	The change in length of an object is directly proportional to the applied force.	0%
What is the Feature of a stress-strain graph that tells you the Young's Modulus	The gradient (of the initial straight line section)	0%
Define Ultimate tensile strength	The maximum stress a material can withstand before breaking	0%
Define the Elastic limit	The point at which a material starts to permanently change shape	0%
Define the Limit of proportionality	The point at which a material stops obeying Hooke's Law	0%
Define the yield point	The point when strain starts to increase very rapidly with stress.	0%
On a force-distance graph the area under the line represent	work done	0%
What is shown by the Area under a force-extension graph	Work done stretching the material/energy stored in a spring	0%
What has the same units as stress	Young's Modulus or Pressure	0%