Projectiles

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# Projectiles - PowerPoint PPT Presentation

Projectiles. About projectile motion To the tune: “The Old Folks at Home” by Stephen Foster C is a comfortable key to sing it in. Projectiles – verse 1. When a thing is thrown and it zips off It will chase a parabolic arc We can do this with a gun or ball

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## PowerPoint Slideshow about 'Projectiles' - sally

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Presentation Transcript

Projectiles

To the tune: “The Old Folks at Home” by Stephen Foster

C is a comfortable key to sing it in

Projectiles – verse 1

When a thing is thrown and it zips off

It will chase a parabolic arc

We can do this with a gun or ball

Or even Fido’s stick when in the park

Projectiles - Chorus

Horizontally, its speed is set

Of acceleration that way, it is free

Vertically, everything that’s not held up

Accelerates to earth, with value “g”

Projectiles – verse 2

An object that’s not held up by anything

Will plunge to earth like concrete in free-fall

As well as that, in a horizontal sense

There is no force that pushes it at all

Projectiles - Chorus

Horizontally, its speed is set

Of acceleration that way, it is free

Vertically, everything that’s not held up

Accelerates to earth, with value “g”

Projectiles – verse 3

Projectiles are objects that are in the air

Free from almost all external force

We ignore all lift and thrust and drag but we

Must include the vector, weight, of course

Projectiles - Chorus

Horizontally, its speed is set

Of acceleration that way, it is free

Vertically, everything that’s not held up

Accelerates to earth, with value “g”

Projectiles – verse 4

To find the range of anything that’s thrown about

We need to find the time until it lands

The vertical velocity, when t is nought

Combined with “g” will put it in our hands

Projectiles - Chorus

Horizontally, its speed is set

Of acceleration that way, it is free

Vertically, everything that’s not held up

Accelerates to earth, with value “g”

Projectiles – verse 5

Finally, now we know our time of flight

And the constant horizontal speed

We can find the distance ‘til the object drops

And thus we then have all the stuff we need

Projectiles - Chorus

Horizontally, its speed is set

Of acceleration that way, it is free

Vertically, everything that’s not held up

Accelerates to earth, with value “g”

Projectiles – Chorus – last time

Horizontally, its speed is set

Of acceleration that way, it is free

Vertically, everything that’s not held up

Accelerates to earth, with value “g”