Reflection6:

Today Mr Ward showed us some different ways to join two or more pieces of pine wood.

- we learnt how to make a rebate joint, this joint increases the glueing area which would then make the pieces more sound:

- we then learnt how to do a simple joint called a butt joint, this was a simple joint that all you do is glue to flat surfaces together then hold it together with a nail.

- the final joint we learnt was a reinforced but joint, this was a triable nailed and glued onto a butt joint.

Reflection 5:

New topic:

Design Futures Year 10 Pre- Engineering Trebuchet Design:

Height: Is not to exceed 550mm

- energy can not be created but it can be transferred or transformed.
- the trebuchet transforms from stored gravitational potential energy to kinetic energy to air friction

EXAMPLES:

This is a photo of a Trebuchet with a sling.
Mr Wards:
Potential Energy (gravity) = m x g x h
                                         = 3 x 9.8 x 0.4
                                         = 11.76 Joules