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SHM. Find the maximum speed of a particle moving in SHM, if its displacement is given by x = 5cos3t + 2sin3t answer: 16.2m/s Is there any particular method that i'm meant to use in SHM for this question?

lol i'm in dire need of help. sitting HSC this year for 3unit as an accelerant and i haven't learnt SHM yet T_T

Hey guys. So i'm kinda.. completely lost for Simple Harmonic Motion. I completely dozed off during the week that it was being taught and now that school is already over i can't ask my teacher for help. I've read some textbooks and they sort of gave me an idea, but i still don't have a firm...

go for it :D!

Hey Guys, i wasn't certain as to where i should've posted this thread, but anyway.... I found out today that i've been nominated for the SRC. However those who wish to apply to be school captain have to deliver a 2 minute speech stating why they would make the best captain. They also have to be...

lol thanks

Hey guys. For english i've been asked to write a short story (1000-1200 words) which has the dominant theme of 'change' in it. I know that is is an extremely broad topic for a story, but i just can't seem to think of any ideas that aren't cliche.... Any ideas for a change story? Ideas much...

1. A batsman hits a cricket ball towards a fieldman who is 65m away. The ball reaches a maximum height of 4.9m and the horizontal component of its velocity is 28m/s. Find the constant speed at which the fieldsman must run forward, starting at the instant the ball is hit, in order to catch the...

A stone is thrown so that it will hit a bird at the top of a pole. However, at the instant the stone is thrown, the bird flies away in a horizontal straight line at a speed of 10ms^-1. The stone reaches a height double that of the pole and, in its descent, touches the bird. Find the horizontal...

oooh okay. i've just been having difficulty with questions where two particles collide. do we normally just solve simultaneously equations?

LOL thanks a whole bunch Gurmies. :) But don't be surprised if i post more questions later :haha:

ohhh cool cool. I was also wondering when you find the y equation for the 2nd particle, what is the angle and velocity?

A stone is projected horizontally from the top of a building 30m high with a velocity of 15m/s. At the same instant another stone is projected from the foot of the building with a velocity of 30m/s at an angle of 60* to the horizontal. The two stones move in the same vertical plane. Prove that...

Hey Gurmies you helped me with a maths question a couple days ago concerning projectile motion. http://community.boredofstudies.org/13/mathematics-extension-1/220304/need-help-projectile-motion.html#post4565957 I was wondering if you could please explain how you knew that for the second...

Hey gurmies. In part b) of the question you stated that for the second particle, when t = 1, y = 2. How were you able to know this? :) PS. I was also wondering how you were able to derive the vertical displacement of the particle P in terms of t.

A particle is projected with a speed of 25m/s in the direction of a point P distant 24m horizontally and 7m vertically above the point of projection. a) Find the coordinates of the point on the trajectory directly below P. b) At the instant of projection of the particle, a second particle is...

I saw in the Couchman textbook that the physics formulae: v = u + at s= ut + 1/2at^2 v^2 = u^2 + 2as are used in solving some projectile motion questions. Is using physics formulae (specifically in the HSC) a legitimate method of doing these projectile motion questions, or should we stick to...

An object is projected with horizontal velocity 8ms^-1 and vertical velocity 5ms^-1. Find the range of its flight. (use g = 10ms^-2)

can someone please show me the entire method of solving this question using the angle = 0.

so should i be using the angle of projection = 0 or 90? :S