a The longer the lever, the bigger the force that is needed to move an object.
b It is easier to close a door if you push the door close to the hinge
c The shorter the lever, the bigger the force that is needed to move an object
d Joints are examples of pivots.
e Bones are examples of levers.
C, D and E
To investigate, through practical experimentation, the principle of moments.
What do we need to record?
How many columns will we need in our table?
Recording your results
Weight and Mass
YouTube - Eureka! Episode 7 - Weight vs. Mass
YouTube - Eureka! Episode 6 - Gravity
anticlockwise moments = clockwise moments
two boys of different weights sit opposite each other on a see saw, both the same distance from the pivot
the turning effect of a force
GCSE PHYSICS: Moments
Gina weighs 500 N and stands on one end of a seesaw. She is 0.5 m from the pivot.
What moment does she exert?
moment = 500 x 0.5
= 250 Nm
The moment of a force is given by the equation:
Moments are measured in Newton centimetres (Ncm) or Newton metres (Nm).
The girl on the right exerts a clockwise moment, which equals .