If velocity of an object is (2į) m/s and moves with constant
acceleration (i-)m/s2, then the velocity of the particle at the
end of 2 s is
Answers
Answered by
1
Explanation:
ANSWER
initial velocity u=2m/s
acceleration a = 2m/s at 60
∘
component of acceleration in direction of velocity and perpendicular to initiail velocity according to figure
a
x
=acos60
0
=2×
2
1
=1
a
y
=asin60
0
=2×
2
3
=
3
s
x
=ut+
2
1
a
x
t
2
=2×2+
2
1
×1(2)
2
=6m
s
y
=ut+
2
1
a
x
t
2
=0+
2
1
×
3
(2)
2
=2
3
m
net displacement = S=
s
x
2
+s
y
2
=
36+12
=4
3
m
again for velocity in X any Y direction
v
x
=u+a
x
t=2+1×2=4m/s
v
y
=u+a
y
t=0+
3
×2=2
3
m/s
net velocity = V=
v
x
2
+v
y
2
=
16+12
=2
7
m/s
thus .
option A is correct
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