posted by jena .
A baseball is hit with a horizontal speed of 16 m/s and a vertical speed of 16 m/s upward. What are these speeds 5 s later? horizontal speed ?? m/s
vertical speed ?? m/s
The horizontal speed stays the same until the ball hits the ground. Vertical speed v obeys the equation
Vy = Vy,o - g t = 16 - (9.8)*5 = -33 m/s, also until it hits the ground.
Unless the ball was hit off a cliff, it will have hit the ground well before 5 seconds of flight. After 3.27 s, to be exact. The vertical velcoity after it hits the ground will then be zero.