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Physics
Physics
Problem
Which one of the following expressions correctly gives the average acceleration of a body whose velocity changes from
v
1
v_1
v
1
at time
t
1
t_1
t
1
to
v
2
v_2
v
2
at time
t
2
t_2
t
2
? a)
v
2
+
v
1
t
2
−
t
1
\dfrac{v_2+v_1}{t_2-t_1}
t
2
−
t
1
v
2
+
v
1
b)
v
2
−
v
1
t
2
+
t
1
\dfrac{v_2-v_1}{t_2+t_1}
t
2
+
t
1
v
2
−
v
1
c)
v
2
−
v
1
t
2
−
t
1
\dfrac{v_2-v_1}{t_2-t_1}
t
2
−
t
1
v
2
−
v
1
d)
v
2
−
v
1
t
2
+
t
1
2
\dfrac{v_2-v_1}{\dfrac{t_2+t_1}{2}}
2
t
2
+
t
1
v
2
−
v
1
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