A force of F = (4i + 2j - k ) acting on a body maintains its velocity v = (3i +2j +3k ) at some instant of time .Thr power exerted is
Answers
Answered by
2
Force,
F
=(4
i
^
+
j
^
−2
k
^
)N
Velocity,
v
=(2
i
^
+2
j
^
+3
k
^
)ms
−1
Power, P=
F
⋅
v
=(4
i
^
+
j
^
−2
k
^
)⋅(2
i
^
+2
j
^
+3
k
^
)
=(8+2−6)W=4 W.
Similar questions