a particle is displaced through (3î-2j+2k) meters under influence of force (-i+j-5k) newton calculate the work done
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Answer:
1J
Explanation:
Work done is the dot product of Force and displacement.
W=
F
⋅
r
=
F
⋅(
r
2
−
r
1
)
⇒W=(
i
^
+2
j
^
+3
k
^
)⋅((
i
^
−
j
^
+2
k
^
)−(
i
^
+
j
^
+
k
^
))
⇒W=(
i
^
+2
j
^
+3
k
^
)⋅(−2
j
^
+
k
^
)
⇒W=−4+3=−1J
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