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Mathematics
Mathematics
Problem
For the motion of a stone, the height above ground (in metres) after
t
t
t
seconds is
h
(
t
)
=
−
4
t
2
+
16
t
+
12
h(t)= -4t^{2}+16t+12
h
(
t
)
=
−
4
t
2
+
16
t
+
12
. Solving
h
(
t
)
=
0
h(t)=0
h
(
t
)
=
0
gives
t
=
−
1
t=-1
t
=
−
1
and
t
=
3
t=3
t
=
3
. Which value of
t
t
t
is physically meaningful? Give a reason for your choice.
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