explain that to stretch, bend or compress an object, more than one force has to be applied
applications to real life situations
explain that to stretch, bend or compress an object, more than one force has to be applied
applications to real life situations
describe the difference between elastic and plastic deformation (distortions) caused by stretching forces
describe the relationship between force and extension for a spring and other simple systems
graphical representation of the extension of a spring
describe the difference between linear and non-linear relationships between force and extension
calculate a spring constant in linear cases
calculate the work done in stretching
describe that all matter has a gravitational field that causes attraction, and the field strength is much greater for massive objects
define weight, describe how it is measured and describe the relationship between the weight of an object and the gravitational field strength, g
knowledge that the gravitational field strength is known as g and has a value of 10 N/kg at the earth’s surface
recall the acceleration in free fall
apply formulae relating force, mass and relevant physical constants, including gravitational field strength, g, to explore how changes in these are inter-related
describe examples in which forces cause rotation
location of pivot points and whether a resultant turning force will be in a clockwise or anticlockwise direction
define and calculate the moment of a force
application of the principle of moments for objects which are balanced
explain how levers and gears transmit the rotational effects of forces
an understanding of ratios and how this enables gears and levers to work as force multipliers
recall that the pressure in fluids (gases and liquids) causes a net force at right angles to any surface
use the relationship between the force, the pressure and the area in contact
an understanding of how simple hydraulic systems work