2. From the preceding calculation, it should be obvious that to experimentally time the distance of fall for a dropped object is critical. To gain an appreciation of how the distance
of fall varies with time, consider the daring experimenter shown in GL Fig. 5.1. Jo-Jo
will illustrate the time-distance relationship of free fall by stepping off a high, vertical cliff
with a timer in one hand and a marker in the other. For each second of fall, he makes a
mark on the cliff face.
But wait. Jo-Jo wants you to determine how far he would fall during each second for
the first 5 seconds. He requests you plot the results on a distance versus time graph for a
visual display
Oh, one other thing. He wants to open his parachute when reaching 60 mi/h. At what
time, or between which seconds, should he do this?

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

To understand the electric potential and electric field of a point charge in three dimensions consider a positive point charge q, located at the origin of three-dimensional space. throughout this problem, use k in place of 14? ? 0. part adue to symmetry, the electric field of a point charge at the origin must point from the origin.answer in one word.part bfind e(r), the magnitude of the electric field at distance r from the point charge q.express your answer in terms of r, k, and q. part cfind v(r), the electric potential at distance rfrom the point charge q.express your answer in terms of r, k, and q part dwhich of the following is the correct relationship between the magnitude of a radial electric field and its associated electric potential ? more than one answer may be correct for the particular case of a point charge at the origin, but you should choose the correct general relationship. a)e(r)=dv(r)drb)e(r)=v(r)rc)e(r)=? dv(r)drd)e(r)=? v(r)r