Question

A body projected vertically up reaches a maximum
height of 9.8m. Its time of flight is 2Vn sec. then the
value of 'n' is​

Answer 1

first use 3rd equation of motion to calculate the initial velocity

v=0

g=-9.8

h=9.8

mark as brain list

⇒

so u=9.8m/s

Now use 1st equation of motion

⇒t= u/g= 1 second (ans)