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Physics
Physics
Problem
A ball is projected vertically upward with initial speed
u
u
u
. Upward is chosen as positive. Which expression represents its velocity
v
v
v
after time
t
t
t
? a)
v
=
u
+
g
t
v = u + gt
v
=
u
+
g
t
b)
v
=
u
−
1
2
g
t
v = u - \dfrac{1}{2} g t
v
=
u
−
2
1
g
t
c)
v
=
u
−
g
t
v = u - gt
v
=
u
−
g
t
d)
v
=
u
+
2
g
t
v = u + 2 g t
v
=
u
+
2
g
t
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