Onsider the free body diagram. if the sum of the tension forces is equal to the force of gravity, which description best applies? a) a book is at rest on a tabletop. b) a physics student rests a backpack upon one shoulder. c) a girl hangs by both hands, motionless, from a trapeze. d) a girl falls slowly to earth while strapped to a parachute.

Which situation will produce the greatest change of momentum

Current from a charged capacitor lights a bulb. as time goes on the brightness of the

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