Half-Yearly Study Thread (1 Viewer)

[MuffinMan]

Got the idea off IT section
We'll lets help each other out
When i finish my notes i'll post it on this thread
Umm...post away!

 

[MuffinMan]

bump...bump...bump
does any1 here do phys??

 

[physician]

bump...bump...bump
does any1 here do phys??

yes!...

unfortunately my notes aren't typed.. plus i don't have any on motors and generators I only have some for space... and i presume ur half yearly is on both...

but yeh i'll try help out if there are any questions u may have...

my physics half yearly isn't until week 4 term 2 which gives me the entire holiday to study... hehe

 

[MuffinMan]

ur so lucky my tests r on the week after friday
man my exam timetable is screwed i got chem on tuesday of that week also

 

[m111]

I'll be in on this physics-based sharing of brain power!
(unfortunately, I have not typed notes either. must get on to that.)
my test is next thursday... Motor/Generators, and Space (to 9.2.4.3... if u know what I mean!)

- m111

 

[zenger69]

yes.... so does anyone has any challenging questions to get us prepared or some multiple choice questions.

Let me go and find some.....

 

[zenger69]

An inertial frame of reference can best be described as:

a) a frame of reference moving at the speed of light
b) a stationary frame of reference with inertia
c) a frame of recenge used in inertial relativity
d) a frame of reference in which Newton's first law is true

if I came across this question, i'd be pretty stumped. Because the answer is not what u'd think it to be.









ANS (D) WELL DONE

 

[physician]

yes.... so does anyone has any challenging questions to get us prepared or some multiple choice questions.

Let me go and find some.....

Not exactly a challenging question but it'll get u revising basics...


An astronaut throws a 1.5 kg hammer at 22.5 m/s at 20^o to the vertical from the surface of Venus, gravitational acceleration 8.9 m/s²

( a ) Calculate the vertical and horizontal components of the velocity of the hammer

( b ) Calculate its time of flight

( c ) Calculate how high the hammer rises

( d ) Calculate its range

( e ) Calculate its velocity on hitting the surface of Venus

 

[physician]

An inertial frame of reference can best be described as:

a) a frame of reference moving at the speed of light
b) a stationary frame of reference with inertia
c) a frame of recenge used in inertial relativity
d) a frame of reference in which Newton's first law is true

if I came across this question, i'd be pretty stumped. Because the answer is not what u'd think it to be.

Id say ( d )

 

[physician]

Extension Question

A stone is thrown vertically upwards with a velocity of 29.4 m/s from the edge of a cliff 78.4 m high. The stone falls so that it just misses the edge of the cliff and falls to the ground at the foot of the cliff. Determine the time taken by the stone to reach the ground.

 

[physician]

Anyone up for the challenge....?????????

 

[KFunk]

Time to reach max height = 29.4/9.8 = 3 seconds

Max height:
S = ut + 1/2at²
= 29.4*3 - 1/2*9.8*9
=44.1 meters.

Therefore distance to ground = 44.1 + 78.4 = 122.5m

Velocity at base of cliff = √(2*9.8*122.5)= 49ms^-1 (from v² = u² + 2as)

then calculating time of fall
v= u + at (u = 0)
t= v/a = 5 seconds

So the overall trip took 3 + 5 = 8 seconds.

 

[dawso]

oh the effort....

 

[MuffinMan]

hey guys since i keep asking u guys for resources i think i will post some of my own
this is the one our teacher asked us to do for hw so i decided to type it up instead of writing it out so i could share with u guys

its dot point 3.11 the last one of section 3 for ideas to implementation

 

[MuffinMan]

i do 3.10 later tonight...

 

[MuffinMan]

cant find anything on 3.10 in textbook o well

does anyone have info on the dot point
"gather process and present secondary information to discuss the shortcomings in available communication technology led to the increased knowledge of the properties of materials with particular reference to the invention of the transistor"

I think its incorporated in the previous dp above but yeh...

o i almost forgot theres this last section that i missed out on the document i attatched above

it goes like this

Socially, the avent of transistors has made continuing changes to the way we live our lives. This book is written using integrated circuits. We communicate with friends using mobile phones that use chips. The way we do business, travel, shop and are entertained - almost all our activities rely on silicon microchip technologies

 

[Sphyx]

my half yearly will only assess motors and generators. space will be included, but it will not go towards the HSC assesment mark.

 

[Sirius Black]

(d)!

An inertial frame of reference can best be described as:

a) a frame of reference moving at the speed of light
b) a stationary frame of reference with inertia
c) a frame of recenge used in inertial relativity
d) a frame of reference in which Newton's first law is true

if I came across this question, i'd be pretty stumped. Because the answer is not what u'd think it to be.

I agree with physician on choice (d) but still got a q here - isn't the defn of a inertial frame of reference the one in which All Laws of Physics apply? Obviously Newton's first law is just a specific case of it...

 

[imano]

hey guys im a new mamber and i was wondering if you have any prelim notes 4 physics

 

[physician]

hey guys im a new mamber and i was wondering if you have any prelim notes 4 physics

It's great that ur actually searching for notes for prelim.. i never really knew the importance of notes until yr 12.. and although they weren't important for yr 11.. it provides good practice for yr 12...

unfortunately i don't have notes for prelim... but i just thought that what ur doing is great