The distance between boy and a hill is 250 metres. If the boy shouts, after how long will the echo be heard?

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer

i think the answer is tomato juice? not entirely sure though

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.