#P6.3.1
explain, with examples, that to stretch, bend or compress an object, more than one force has to be applied
#P6.3.2
describe and use the particle model to explain the difference between elastic and plastic deformation caused by stretching forces
#P6.3.3
a) describe the relationship between force and extension for a spring and other simple systems
b) describe how to measure and observe the effect of forces on the extension of a spring
PAG2
#P6.3.4
describe the difference between the force-extension relationship for linear systems and for non-linear systems
#P6.3.5
recall and apply the relationship between force, extension and spring constant for systems where the force-extension relationship is linear:
force exerted by a spring (N) = extension (m) × spring constant (N/m)
#P6.3.6
a) calculate the work done in stretching a spring or other simple system, by calculating the appropriate area on the force-extension graph
b) describe how to safely use apparatus to determine the work done in stretching a spring
PAG2
#P6.3.7
select and apply the relationship between energy stored, spring constant and extension for a linear system:
energy stored in a stretched spring (J) = ½ × spring constant (N/m) × (extension (m))2