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Byju's Answer
Standard IX
Physics
Distance - Time Graph
The a-t graph...
Question
The a-t graph of particle moving along a straight line is given below. At t=0s its velocity is V and its velocity at t=4s is 3V then what is its velocity at t=6s?
(1) 5 m/s
(2) 15 m/s
(3) 20 m/s
(4) 25 m/s
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Solution
T
h
e
a
r
e
a
u
n
d
e
r
a
-
t
g
r
a
p
h
g
i
v
e
s
c
h
a
n
g
e
i
n
v
e
l
o
c
i
t
y
T
h
e
a
r
e
u
n
d
e
r
t
h
e
a
-
t
g
r
a
p
h
i
s
i
n
t
h
e
f
o
r
m
o
f
t
r
a
p
a
z
e
u
m
w
i
t
h
p
a
r
a
l
l
e
l
s
i
d
e
s
6
a
n
d
2
r
e
s
p
e
c
t
i
v
e
l
y
;
a
n
d
h
e
i
g
h
t
b
e
i
n
g
5
A
r
e
a
u
n
d
e
r
a
-
t
g
r
a
p
h
=
1
2
6
+
2
×
5
⇒
∆
v
=
1
2
6
+
2
×
5
=
20
m
/
s
v
f
-
v
i
=
20
m
/
s
G
i
v
e
n
:
v
i
=
0
v
f
=
20
m
/
s
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