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Physics
Physics
Problem
A body of mass 5 kg under the action of constant force
F
⃗
=
F
x
i
^
+
F
y
j
^
\vec{F} = F_x \hat{i} + F_y \hat{j}
F
=
F
x
i
^
+
F
y
j
^
has velocity at
t
=
0
t = 0
t
=
0
s as
v
⃗
=
(
6
i
^
−
2
j
^
)
\vec{v} = (6\hat{i} - 2\hat{j})
v
=
(
6
i
^
−
2
j
^
)
m/s and at
t
=
10
t = 10
t
=
10
s as
v
⃗
=
+
6
j
^
\vec{v} = +6\hat{j}
v
=
+
6
j
^
m/s. The force
F
⃗
\vec{F}
F
is: a.
(
−
3
j
^
+
4
i
^
)
(-3\hat{j} + 4\hat{i})
(
−
3
j
^
+
4
i
^
)
N b.
(
−
3
5
i
^
+
4
5
j
^
)
\left(-\frac{3}{5}\hat{i} + \frac{4}{5}\hat{j}\right)
(
−
5
3
i
^
+
5
4
j
^
)
N c.
(
3
i
^
−
4
j
^
)
(3\hat{i} - 4\hat{j})
(
3
i
^
−
4
j
^
)
N d.
(
3
5
i
^
−
4
5
j
^
)
\left(\frac{3}{5}\hat{i} - \frac{4}{5}\hat{j}\right)
(
5
3
i
^
−
5
4
j
^
)
N
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