Ball bearings are made by letting spherical drops of molten metal fall inside a tall tower -- called a shot tower -- and solidify as they fall.
(a) If a bearing needs 3.3 s to solidify enough for impact, how high must the tower be?
{blank} m

(b) What is the bearing's impact velocity? (Take up to be positive.)
[blank]m/s

Question

Ball bearings are made by letting spherical drops of molten metal fall inside a tall tower -- called a shot tower -- and solidify as they fall.
(a) If a bearing needs 3.3 s to solidify enough for impact, how high must the tower be?
 {blank} m

(b) What is the bearing's impact velocity? (Take up to be positive.)
  [blank]m/s

unklerhaukus · Answer

is the shot tower empty?, or is there a fluid in the tower?

unklerhaukus · Answer

if the tower is empty use

$$y(t)=y_0+{v_y}_0t+\tfrac12a_yt^2$$

And set your origin at the top of the tower $y_0=0$,
assuming the metal is dropped from rest ${v_y}_0=0$
 with the y axis pointing down $a_y=g$

unklerhaukus · Answer

find the distance fallen $y(t)$, after $t=3.3[\text s]$.

This is the minimum height of the shot tower

unklerhaukus · Answer

make sense?