a car is moving with velocity vector v=i+2j+4k by application of force vector F=2i+2j+2k on it by its engine.then the power of car is
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Answered by
0
Answer:
P=
F
⋅
v
P=(10
i
^
+10
j
^
+20
k
^
).(5
i
^
−3
j
^
+6
k
^
)
P=50−30+120=140
Answered by
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The power of car is 14 W.
Given,
Velocity vector=i+2j+4k
Force vector=2i+2j+2k.
To find,
the power of car.
Solution:
Assuming the velocity and force to be in their S.I. units, the power will come in watt(W).
Power is equal to the scalar product of force and velocity.
P=F.v
where,
F-force vector
v-velocity vector
or
P=Fvcosθ
P=(i+2j+4k).(2i+2j+2k)
P=2+4+8
P=14 watt.
The power of car is 14 W.
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