Step-by-step explanation:
PE =200 J
m = 10
h=?
we know that ,
pE = mgh where g is acceleration due to gravity of earth = 10 m/s ^2
200= 10 ×10 × h
h = 2 m
and
KE = 1/2 mv^2
250 = 1/2 ×5 ×v^ 2
100 = V ^ 2
v= 10 m/s
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