Friday, May 27, 2011
Who is here?
'Anyone who is not here, could you please put your hand up?'
Wednesday, March 30, 2011
Rockets
'NASA wanted my design for this rocket, but I didnt give it to them'
Hat trick
'last time i didnt do this quite right.. hopefully i can get it right this time..'
Jennings breaks 3 plates
More Inertia
'woah did you see that plate go flying! id hate to see were that went... theres probably one less student in the class'
How Inertia Works
We may end up with a chipped conical flask here.. I'll blame the year 10 class.
Garbage Technicians
There's a special name for bullet proof vests.. It's like garbage collectors, they have a special name now.. Garbage technicians or something.
Relative Motion
'what happens if you toss a coin in the air while a car is accelerating?
it would come back and hit you in the face.
the driver would be mildly amused.'
292 whats?
'So the force is 292 Newtons. Be careful later in the year when we are talking about power. if we were talking about power it would be 292 what?
thats actually right, power is measured in watts'
You Can't Change Gravity
'You cant reduce gravity, the plane weighs the same the whole time.. unless you start chucking people out.. they wouldn't be overly thrilled.'
Tuesday, March 29, 2011
Dont Sit in the Middle!
'The seat belt in the middle of the back [of the car] is very unsafe. If you need to sit in the back don't sit there... Get someone you don't like to sit there.'
If We Lived on Jupiter
'Jupiter has a gravitational constant of ~26m.s^-2 so if humans evolved there they would be quite small.. lots of tiny short people with fat little legs.'
Seatbelts in Aeroplanes
'Seat belts are only used in aeroplanes to keep you in your seat for turbulence.... because lets face it, if a plane crashes... your gone, you'll go splat.'
Sunday, March 27, 2011
A soccer player.
Jennings writes an example question on the board 'how high must a soccer player kick the ball if it is to go x metres with a horizontal speed of x metres per second. Gets an answer of ~250m high. Figures out the speed.
‘If this soccer player ever learns to kick straight, there’ll be some dead soccer players.’
‘if NASA wants a cheap way to put satellites into orbit, they’ll get this guy to kick it.’
The Physics of Golf
Explaining the physics behind the dimples on golf balls.
'You can’t have a point on a golf ball. it’d be mildly amusing if you hit someone.'
Pauses for thought
'Otherwise they’d die….' 'There’d be less spectators.'
Vx or Vy?
Writing an equation
Jennings: Writes Vx
Student: 'Don't you mean Vy?'
'… yeah Vy, sorry the texta wasn’t listening.'
Jennings makes another mistake with the purple pen
'I don’t like purple pens they’re dumb.'
Jennings makes yet another mistake
'I’ll give up on this purple one. I’ll only use it on year 10s'
How to jump off a balcony
Explaining where one would land if ther were to jump off a balcony - how fast one would need to run in order to hit a target
‘You don’t have too many horizontal balconies, unless you fall over drunk’