Bourne believed that an object would float or sink at will as long as he could <span>manipulate the effect's of buoyancy which control and object to sink or float. Hope this helps!
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<span>a. How much time elapses from start to stop
v = u + at
20 = 0 + 2t1
t1 = 10 sec
2nd phase:
v = u - at
0 = 20 - 1 x t2
t2 = 20 sec
total time = t1+t2 = 10 + 20 = 30 sec
b.</span><span>1st phase:
s = ut + 1/2at^2
s1 = 0 + 1/2 x 2 x (10)^2
s1 = 100 m
</span><span>2nd phase:
By s = ut - 1/2at^2
s2 = 20 x (20) - 1/2 x 1 x (20)^2
s2 = 200 m
total distance(s) = s1+s2 = 100 + 200 = 300 m
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hope this helps
an animal that feeds on carrion, dead plant material, or refuse
