Answer:
Velocity is 7.6 m/s in the downward direction
Step-by-step explanation:
The equation relating initial velocity, velocity after time t is given by the equation
v = u + at
Here u is the initial velocity(m/s), t the time in seconds and a the acceleration in m/s²
Since the ball is thrown upward the acceleration is due to gravitational force and is approx -9.8 m/s²
The negative sign for acceleration is due to the fact that the force of gravity is acting downward and slowing the ball
Plugging in values for u =12 m/s and t = 2 secs
v = 12 - 9.8 x 2
v = 12 - 19.6
v = - 7.6 m/s
The negative sign means that the ball is moving downward. It has reached its maximum height and is now falling with same acceleration but from an initial velocity of 0 m/s