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Physics
Physics
Problem
Starting with
v
=
u
+
a
t
v = u + a t
v
=
u
+
a
t
and
s
=
u
t
+
1
2
a
t
2
s = u t + \tfrac12 a t^2
s
=
u
t
+
2
1
a
t
2
, which of the following substitutions for
t
t
t
in the second relation will lead directly to
v
2
=
u
2
+
2
a
s
v^2 = u^2 + 2 a s
v
2
=
u
2
+
2
a
s
? a)
t
=
v
+
u
a
t = \dfrac{v+u}{a}
t
=
a
v
+
u
b)
t
=
v
−
u
a
t = \dfrac{v-u}{a}
t
=
a
v
−
u
c)
t
=
u
−
v
a
t = \dfrac{u-v}{a}
t
=
a
u
−
v
d)
t
=
v
−
u
2
a
t = \dfrac{v-u}{2a}
t
=
2
a
v
−
u
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