All bearings are made by lebng spherical drops of molten metal fall inside a tall tower – called a shot tower – and solidify as they fall a height h. the bearings are released from rest. a)draw the problem. b)if a bearing needs 4.0 s to solidify enough for impact, how high must the tower be? (lc) c)what is the bearing’s impact velocity? (lc)

Part b)

h = 78.5 m

Part c)

v = 39.24 m/s

Explanation:

Part b)

If ball need t = 0 to t = 4 s then height of the tower is the total displacement of the ball in t = 4 s interval

here if ball start from rest

then its displacement is given as

Part c)

Speed of the bearing at the end of the motion of the ball

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray