i need help with understanding this question - esp the part given in bold:

"In Dallas on November 22, 1963, President Kennedy was assassinated by Lee

Harvey Oswald (if you do not believe any of the conspiracy theories). Oswald

fired a Mannlicher-Carcano rifle from approximately 90 metres away. The

sight on Oswaldâ€™s rifle was less than ideal; if the bullet travelled in a straight

line after leaving the rifle (at a velocity of roughly 700 m/s) then the sight

aimed about 10 cm too high at a target 90 metres away. How much would the drop in the trajectory due to gravity compensate for this? (The initial vertical

velocity is zero, and satisfies dv/dt = -g, while the horizontal velocity is constant if we neglect air resistance.)"

I know its a projectile question using the ODE and equations of motion but the "sight" part is confusing me - help please!!

"In Dallas on November 22, 1963, President Kennedy was assassinated by Lee

Harvey Oswald (if you do not believe any of the conspiracy theories). Oswald

fired a Mannlicher-Carcano rifle from approximately 90 metres away. The

sight on Oswaldâ€™s rifle was less than ideal; if the bullet travelled in a straight

line after leaving the rifle (at a velocity of roughly 700 m/s) then the sight

aimed about 10 cm too high at a target 90 metres away. How much would the drop in the trajectory due to gravity compensate for this? (The initial vertical

velocity is zero, and satisfies dv/dt = -g, while the horizontal velocity is constant if we neglect air resistance.)"

I know its a projectile question using the ODE and equations of motion but the "sight" part is confusing me - help please!!

Original post by Zii

The sight is like the aimhole. Its where the gun was aiming.

you *******

Original post by 1asdfff

can anyone do this?

After 13 years, I'd hope so. It sounds like a straightforward horizontal/vertical suvat projectile question.

Original post by mqb2766

After 13 years, I'd hope so. It sounds like a straightforward horizontal/vertical suvat projectile question.

You have been expelled from the F38 secret assassin society (emphasis mine).

Original post by DFranklin

You have been expelled from the F38 secret assassin society (emphasis mine).

Er... Maybe that should have been a private message...

Original post by DFranklin

You have been expelled from the F38 secret assassin society (emphasis mine).

The first rule of maths club is, don't talk about maths club.

Original post by 1asdfff

Is the answer 8.11 cm, so gravity makes it 1.89 cm closer, or does it make the gun fire 8.11 cm closer?

8.1 is the vertical distance?

Original post by mqb2766

8.1 is the vertical distance?

yeah should be 8.11 cm higher instead of 10 cm with gravity

Original post by 1asdfff

yeah should be 8.11 cm higher instead of 10 cm with gravity

The question states the sight was less than ideal.

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