Friday

March 27, 2015

March 27, 2015

Posted by **drew** on Tuesday, April 6, 2010 at 10:09pm.

Answer: (10.2cos(theta) + 0.139) sin(theta) = 1

I just need help coming up with that answer

- physics -
**Jacques**, Wednesday, April 7, 2010 at 11:19amYou can get your acceleration equation a=<0, -79000> and get your position equation by integrating and using your initial values so you'll get

s(t) = <1100cos(theta)*t, -39500*t^2 + 1100sin(theta)*t>

then set your y component equal to zero to find how long it will take the ball to hit the "ground"(which will be the tank).

Once you have the "t" with respect to theta, you say the tank moves towards you at 15mph and is initially 3 miles away.

so.. its x-position at time "t" will be 3-15*t(where t is the time you found earlier)

You then set that x-position of the tank to the x-position of the cannonball and figure out what theta is needed.

It will most likely give you an equation that looks different than that equation but doing some simple algebra will give you that.

**Answer this Question**

**Related Questions**

physics - Suppose a fixed cannon is to fire a projectile at an enemy tank, which...

vector geometry - Suppose a fixed cannon is to fire a projectile at an enemy ...

Dynamics - Fundamental Problem 15.12 The cannon and support without a projectile...

physics - A projectile fired vertically up from a cannon rises 200 m before ...

physics - A projectile fired vertically up from a cannon rises 200 m before ...

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

physics - A spring cannon is fastened to a glider at rest on a horizontal ...

physics - A cannon is used by the department of forestry to launch containers of...

physics...plz help me - A cannon is pointed at a 60 degree angle relative to a ...

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