Q.
A vector of magnitude 10 N acting in XY-plane has components 8 N and 6 N along positive X-axis and positive Y-axis, respectively. The coordinate system is rotated about z-axis through angle 900 in anti-clockwise direction. Find x-component and y-component in new coordinate system.
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a
Fx= 8N, Fy = 6 N
b
Fx= 6N, Fy = 8 N
c
Fx = 6 N, Fy = -8 N
d
Fx = -6 N, Fy = 8 N
answer is C.
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Detailed Solution
In new coordinate system,Fsin370= 6NFsin370= 6 NFcos 370 = 8 Nx-component Fx = F sin370 = 10×35 = 6Ny-component Fy = -Fcos370 = -10×45 =- 8 N
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