Review_Statics

For vector addition, you have to use __________ law

• Newton’s Second

• the arithmetic

• Pascal's

• The parallelogram

Resolve F along x and y axes and write it in vector form.

• 80 cos (30°) i – 80 sin (30°) j

• 80 sin (30°) i + 80 cos (30°) j

• 80 sin (30°) i – 80 cos (30°) j

• 80 cos (30°) i + 80 sin (30°) j

Determine the magnitude of the resultant (F1 + F2) force in N when F₁={10 i + 30 j) and F₂= {20 i + 20 j}

• 30

• 40

• 50

• 60

• 30 i + 30 j+ 30 k

• 10 i + 10 j + 10 k

• -10 i- 10 j- 10k

• 200 i + 200 j+ 200 k

The symbols alpha, beta, and gamma designate the ........................ of a 3-D cartesian vector

• unit vectors

• Coordinate direction angles

• Greek societies

• Projection angles

The position vector r_PQ is obtained by

• Coordinates of Q minus coordinates of the origin

• Coordinates of P minus coordinates of Q

• Coordinates of Q minus coordinates of P

• Coordinates of the origin minus coordinates of P

A force of magnitude F, directed along a unit vector U, is given by F = ________.

• F (U)

• U/F

• F/U

• F+U

A force vector, F, directed along a line defined by P Q is given by

• (F/F) r_PQ

• r_PQ/r_PQ

• F(r_PQ/r_PQ)

• F(r_PQ/r_PQ)

The dot product of two vectors P and Q is defined as

If a dot product of two non-zero vectors is 0, then the two vectors must be ____________ to each other.

• Parallel (pointing in the same direction)

• Parallel (pointing in the opposite direction)

• Perpendicular

• Cannot be determined.