Question

If a particle is projected vertically
upward from ground at t= 0 and at two
instant t = 2s and t = 8s particle at
same height ‘h’. The value of height h
is ( g= 10 m/s2) :
1) h = 40 m 2) h = 80 m
3) h = 100 m 4) h = 160 m

Answer 1

answer is h = 80 m

t1= 2sec

t2= 8 sec

t1×t2= 2h/g

2×8=2h/10

160= 2h

h= 80