A 380 g ball falls vertically downward, hitting the floor with a speed of 3.5 m/s and then rebounding upward with a speed of 30 m/s
a) What was the ball's momentum just before it hit the floor? (Do not include the
units in the answer)
Your answer
b) What was the ball's momentum just after it rebounded from the floor? (Do not
include the units in the answer)
Your answer
c) What was the ball's change in momentum during its impact with the floor?(Do
not include the units in the answer)
Your answer

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c