Homework Help: Physics

Posted by Lisa on Thursday, February 2, 2012 at 4:34pm.

A cannon is fired from a cliff 190 m high downward at an angle of 21° with respect to the horizontal. If the muzzle velocity is 34 m/s, what is its speed (in m/s) when it hits the ground?

Physics - bobpursley, Thursday, February 2, 2012 at 4:36pm
final KE= intial KE+initialPE
1/2 m v^2=1/2 m 34^2 + mg*190
solve for v
Physics - Lisa, Thursday, February 2, 2012 at 4:40pm
but i don't have m...
Physics - bobpursley, Thursday, February 2, 2012 at 5:27pm
divide both sides by m. It divides out. You dont have to know the mass.

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