A body is thrown verticarry upwards with an initial velocity of 12m/s.(taking G to be 10m/s^2)

Question

a)how far does it go during this first second?
b)find the maximum height it reaches.
c)how long does it remain in the air?

Answer 1

a) after 1 s the vertical velocity is 2 m/s
... so the average velocity is 7 m/s for the 1st sec

b) similar to a)
... the object reaches its peak after 1.2 s
... the average velocity is 6 m/s

c) time up equals time down
... 1.2 + 1.2

Answer 2

1.2+1.2=2.4