Law of inertia Material: Beaker, index card, penny

Procedure:
1.place the index card over the opening of the beaker
2.place the penny in the middle of the index card
3,Thump, flick, or pull the index card as quickly as possible

1.What happens to thd index card?
2.What happens to the penny
3.How does this show that objects at rest want to stay at rest
4.How does this demonstrate Newton first law of motion? ​

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants