Asmall ball of known mass m, with a small charge +q of known magnitude, is provided. the ball is attached to an insulating string. the additional laboratory equipment available includes only those items listed below, plus stands and clamps as needed.
choose the equipment you would use to make measurements needed to determine the magnitude and direction of the electric field between the two plates:

wooden meterstick, protractor, screen, spring scale, stopwatch, bright light, metal rod, camera (still or video), binoculars.

Answer (d) valerie rides her bike south at 8 kilometers per hour///owen jogs south at 8 kilometers per hour ;

W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j