Jason was on top of the 24m building. He threw a baseball vertically up with an initial velocity 5m/s. The baseball went up to the highest point and then dropped to the ground. What was the final velocity of the baseball right before it hit the ground?

1) Jason was on top of the 24m building. He threw a baseball vertically up with an initial velocity 5m/s. The baseball went up to the highest point and then dropped to the ground.

a) What was the final velocity of the baseball right before it hit the ground?
b) How long (in seconds) did the baseball stay in air?

2) Vector A is (7i+10j); vector B is (2i-7j); Vector C is the resultant vector of A+B.

a) What is the magnitude of vector C?
b) What is the angle between vector C and the positive x axis?

3) King Kong jumps down from the 27 meter tall STEM building. What is its velocity in m/s right before it hits the ground? Please enter a negative number.