Question

Part A:

When an object is falling:

- the 1^st second is from t = 0 to t = 1 s

- the 2^nd second is from t = 1 s to t = 2 s

- in general, the n^th second is from t = n-1 to t = n.

A weather balloon is rising at velocity  v = +58.1 m/s when a bolt falls from the from the carriage. Find the displacement, in m, of the bolt in the 56^th second. As always, assume g is constant and that there is no air friction. The sign of the answer gives the direction of the displacement.

Part B:

Joe stands on the edge of a cliff 261 m high and fires a projectile upward, at an angle 35^o to the horizontal. If the projectile hits the ground at the base of the cliff in 77.2 seconds, find the initial speed of the projectile, in m/s.

Answer 1