1. A small block, with a mass of 0.05 kg compresses a spring with spring constant 350 N/m a distance of 4 cm. It is released from rest, then slides around the loop and up the incline
before momentarily comes to rest at point A. The radius of the loop is 0.1 m.
a. Find the elastic potential energy of the block at point D.
b. Find the velocity of the block at point C.
Find the velocity of the block at the top of the loop at point B.
d. What is the height of point A?
e. Is any work done by the block? Why or why not?

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.