An 93-gg arrow is fired from a bow whose string exerts an average force of 130 N on the arrow over a distance of 78 c. What is the speed of the arrow as it leaves the bow?

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.

Determine the net charge of the predominant form of arg at (a) ph 1.0, (b) ph 5.0, (c) ph 10.5, and (d) ph 13.5