Thursday

October 23, 2014

October 23, 2014

Posted by **Amy** on Thursday, October 28, 2010 at 8:41pm.

I got 731.5 meters. is that right?

- Physics -
**MathMate**, Thursday, October 28, 2010 at 10:33pmASSUMING the cannon direction was horizontal, and neglect air resistance.

Time to free-fall 65m, t:

65 = ut+(1/2)gt²

u=0 (initial vertical velocity)

t=√(65*2/9.81)=3.64 s.

Horizontal distance = 3.64*ux

= 3.64*55

= 200.2m

Can you explain how you got 731.5m?

- Physics -
**bobpursley**, Thursday, October 28, 2010 at 10:34pmI do not know in what direction the cannon was aimed, particularly, the elevation.

Assuming horizontal, and no one would shoot a cannon horizontal, but

time to fall 65m...

65=1/2 g t^2 or

t= sqrt 130/9.8= 3.64sec

distance horizontal= 55m/s*3.64 which is not your answer.

**Answer this Question**

**Related Questions**

Physics - A cannon ball is fired from ground level with a speed of 86.0 m/s at ...

AP Physics - Momentum One of those Civil War cannons is fired. The Cannon has a ...

Physics - A cannon placed at the top of a 100.0 m high cliff fires horizontally ...

AP Physics - 22. a)You are a pirate working for Dread Pirate Roberts. You are in...

Physics - Part 1 You are a pirate working for Dread Pirate Roberts. You are in ...

Physics - Part 1 You are a pirate working for Dread Pirate Roberts. You are in ...

physics - Part 2 You are a pirate working for Dread Pirate Roberts. You are in ...

physics - Two identical cannons fire cannonballs horizontally with the same ...

algebra - i was wondering if i did this right A cannon ball is shot from a ...

Physics - A 500 kg cannon rests on wheels that are free to roll. The cannon ...