projectile launcher

[al3xx]

im doing an investigation on a launcher at the same angel of 45 dergrees and same inital velcoity but different wieghts and to see how far the object goes.
is there an particular forumals i could use to find the initial velcoity and the distance?>

 

[hippy]

More a general maths and physics problem than PICAXE related so Google and other search engines are your best bet for lots of relevant information. Here's what looks like a good starter and I'm sure you will find more ...

http://hyperphysics.phy-astr.gsu.edu/Hbase/traj.html

 

[SilentScreamer]

How do you intend to measure this?

 

[Dippy]

Yes, I agree: Physics not PICAXE.

Basically: kinematics and calculating horizontal/vertical components of velocity using trig.


Get yourself a good GCSE or A level physics book. Or get some advice from your teacher.

You'll probably get some answers from Googlers, but, as hippy says delicately but clearly , this doesn't appear to be a PICAXE related question. So, good luck

Maybe you'll use a PICAXE based device to measure intial velocity?

 

[donrecardo]

Surely if the angle and initial velocity are always the same then the object should travel the same distance regardless of its weight.
Whilst it might take more energy to get a heavier projectile to the same initial velocity surely the thing that determines how far it travels
before it hits the floor will be governed by gravity and that should be the same regardless of the weight . The size and shape might make
a difference due to drag but weight shouldnt matter . Try dropping a bowling ball and a tennis ball from the same height and they hit the floor together.

Don

 

[SilentScreamer]

Surely if the angle and initial velocity are always the same then the object should travel the same distance regardless of its weight.
Whilst it might take more energy to get a heavier projectile to the same initial velocity surely the thing that determines how far it travels
before it hits the floor will be governed by gravity and that should be the same regardless of the weight . The size and shape might make
a difference due to drag but weight shouldnt matter . Try dropping a bowling ball and a tennis ball from the same height and they hit the floor together.

Don

When Dropping objects this is true as gravity on earth is constant.

In the case of a projectile something with greater mass but equal velocity will have a more inertia and be more resistant to friction. If you wanted something to travel further it would be more successful if you increased its velocity rather than increasing its mass as Kinetic Energy = 0.5 X Mass X Velocity squared. Therefore (assuming the velocity is equal to, or greater than 1m/s) increasing the speed has a far greater affect than increasing the mass.

 

[slimplynth]

apologies, it was too tempting, I had to use the lmgtfy site

It's been a while since my A-level Physics (Nuffield ) but maybe this physics forum might be useful to you.