The mass does not matter.
v = 5 - 10t
max height is when v=0
h(t) = 5t - 5t^2
so plug in t = 1/2
or, max h is (v^2-1)/(2g)
A stone of mass 0.7kg is projected vertically upward with a velocity 5m/s. Calculate the height attained. g=10m/s2
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