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What is the component of the force vector →G=(3.0ˆi+4.0ˆj+10.0ˆk)N along the force vector →H=(1.0ˆi+4.0ˆj)N?

a) 3.0 N
b) 4.0 N
c) 5.0 N
d) 6.0 N

User Stagas
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1 Answer

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Final answer:

The component of the force vector G along the force vector H is 3.8 N.

Step-by-step explanation:

To find the component of the force vector G along the force vector H, we can use the dot product formula:

G · H = |G| |H| cos θ

where |G| and |H| are the magnitudes of the vectors G and H, and θ is the angle between them.

Since H does not have a z-component, we can write it as H = (1.0ˆi + 4.0ˆj + 0.0ˆk)N.

Taking the dot product of G and H, we get G · H = (3.0)(1.0) + (4.0)(4.0) + (10.0)(0.0) = 3.0 + 16.0 = 19.0.

The component of G along H is then given by |G| cos θ = |G| (G · H / |G| |H|) = |G| (19.0 / (|(3.0)(1.0) + (4.0)(4.0) + (10.0)(0.0)|)) = 19.0 / √(9.0 + 16.0) = 19.0 / √25.0 = 19.0 / 5.0 = 3.8 N.

Therefore, the component of the force vector G along the force vector H is 3.8 N.

User Ross Bush
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