a massless length of twine can withstand a maximum tension of 490 N. the twine is used to spin a 28 kg ball in horizontal circular motion of a radius 1.8m the ball is spun faster until the twine breaks . what was the maximum speed of the ball

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.