Asked by Tris
Find the unit vector of direction for the following vector quantities.
(a) force F = (9.0î − 6.0ĵ) N
F hat =
(b) displacement D = (−4.0î − 8.0ĵ) m
D hat =
(c) velocity
v = (−3.50î + 6.50ĵ) m/s
v hat =
(a) force F = (9.0î − 6.0ĵ) N
F hat =
(b) displacement D = (−4.0î − 8.0ĵ) m
D hat =
(c) velocity
v = (−3.50î + 6.50ĵ) m/s
v hat =
Answers
Answered by
Damon
Find the unit vector of direction for the following vector quantities.
(a) force F = (9.0î − 6.0ĵ) N
|F| = sqrt (81 + 36) = sqrt 117 = 10.817
so
(9/10.817)i - (6/10.817)j
which is
0.832 i - 0.555 j
==========
check .83^2 + .56^2 = .69 + .31 which is about one :)
Do the others the same way
(a) force F = (9.0î − 6.0ĵ) N
|F| = sqrt (81 + 36) = sqrt 117 = 10.817
so
(9/10.817)i - (6/10.817)j
which is
0.832 i - 0.555 j
==========
check .83^2 + .56^2 = .69 + .31 which is about one :)
Do the others the same way
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