{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

76_Physics ProblemsTechnical Physics

# 76_Physics ProblemsTechnical Physics - Chapter 3*P3.66 Let...

This preview shows page 1. Sign up to view the full content.

Chapter 3 77 *P3.66 Let θ represent the angle the x -axis makes with the horizontal. Since angles are equal if their sides are perpendicular right side to right side and left side to left side, θ is also the angle between the weight and our y axis. The x -components of the forces must add to zero: + = 0 150 0 127 0 . sin . N N θ . (b) θ = ° 57 9 . θ y 0.127 N x θ 0.150 N T y FIG. P3.66 (a) The y -components for the forces must add to zero: + °= T y 0 150 57 9 0 . cos . N a f , T y = 0 079 8 . N . (c) The angle between the y axis and the horizontal is 90 0 57 9 32 1 . . . ° °= ° . P3.67 The displacement of point P is invariant under rotation of the coordinates. Therefore, r r = and r r 2 2 = b g or, x y x y 2 2 2 2 + = + b g b g . Also, from the figure, β θ α = F H G I K J = F H G I K J = + tan tan tan tan 1 1 1 y x y x y x y x y x α α α e j e j x y y P O t β α θ β α r x FIG. P3.67 Which we simplify by multiplying top and bottom by x cos α . Then,
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Ask a homework question - tutors are online