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Tardigrade
Question
Physics
A point mass of 0.5 kg is moving along x -axis as x=t2+2t, where x is in metre and t is in second. Find the work done by all the forces acting on the body during the time interval (.0,2.) seconds .
Q. A point mass of
0.5
k
g
is moving along
x
-axis as
x
=
t
2
+
2
t
,
where
x
is in
m
e
t
re
and
t
is in second. Find the work done by all the forces acting on the body during the time interval
(
0
,
2
)
seconds .
897
174
NTA Abhyas
NTA Abhyas 2022
Report Error
A
4
J
B
8
J
C
16
J
D
32
J
Solution:
v
=
d
t
d
x
=
2
t
+
2
v
2
sec
=
2
×
2
+
2
=
6
m
se
c
−
1
&
v
0
sec
=
2
×
0
+
2
=
2
m
se
c
−
1
Now,
W
a
ll
=
Δ
K
E
=
2
1
m
(
v
2
2
−
v
0
2
)
=
2
1
×
2
1
×
(
6
2
−
2
2
)
=
4
1
×
32
=
8
J