Acharge of 5.0 mu or micro cc is located at x = 0 cm, y = 0 cm. another charge q2 is located at x = 15 cm, y = 0 cm. the force on a 2 mu or micro cc charge at x = 30 cm, y = 0 cm is 1.4 n, pointing in the negative x direction. when this 2 mu or micro cc charge is positioned at x = 66.56 cm, y = 0 cm, the force on it is zero. determine the charge q2.

In the middle of the night you are standing a horizontal distance of 14.0 m from the high fence that surrounds the estate of your rich uncle. the top of the fence is 5.00 m above the ground. you have taped an important message to a rock that you want to throw over the fence. the ground is level, and the width of the fence is small enough to be ignored. you throw the rock from a height of 1.60 m above the ground and at an angle of 54.0 degrees above the horizontal. part a part complete what minimum initial speed must the rock have as it leaves your hand to clear the top of the fence? express your answer with the appropriate units. part b for the initial velocity calculated in the previous part, what horizontal distance beyond the fence will the rock land on the ground?