a ball dropped from rest falls freely until it hits the ground with a speed of 25 m/s. the time during which the ball is in free fall is approximately?

Aregular polygon has angkes of size 150° each.how many side has the polygon

You are given a vector a = 125i and an unknown vector b that is perpendicular to a. the cross-product of these two vectors is a × b = 98k. what is the y-component of vector b?

Panel bc in fig. p2.76 is semi-circular, with the 3 meter radius and horizontal straight edge through point b. compute (a) the hydrostatic force of the water on the panel, (b) its center of pressure, and (c) the moment of this force about point b. assume atmospheric pressure on the dry side of the panel