A ball of mass 80g is thrown vertically upwards with a velocity of 20m/s

Question

calculate
1)the max height, from the height which the ball is thrown
2) the total time of flight from the point it is released and caught at the same point.(assume g=10 ms-2)

Answer 1

2) 2 sec up and 2 sec down

1) ave vel = 10 m/s

10 m/s * 2 s = ?