READING QUIZ To write the equations of static equilibrium for a particle, it is necessary to apply ___. A) Newton’s law of gravitation B) Newton’s first law of motion C) Newton- Raphson Theory D) Newton’s third law of motion

READING QUIZ A free body diagram of a particle is a sketch that shows ___. A) all the reactive forces acting on the particle B) all the active forces acting on the particle C) all the forces acting on the particle D) the geometry and shape of the particle

CONCEPT QUIZ The following force system will be in static equilibrium if ___. A) R = 5 kN and  = º B) R = 5kN and  = º C) R = 3.5 kN and  = º D) R = 7 kN and  = º  3 kN 4 kN R

CONCEPT QUIZ If a mass is supported by two cables as shown, which of the following statements is true. A) T AC = T BC B) T AC > T BC C) T AC < T BC D) T AC + T BC = m g 20º 45º AB T AC T BC m C

ATTENTION QUIZ If a particle of mass 10 kg is hanging from a cable, the force in the cable is A) 10 kg B) 98.1 N C) 322 lb D) 98.1 kN T m=10kg

ATTENTION QUIZ If a linear elastic spring is used for support, the length of the spring will change ___. A) in the direction of, and proportional to, the force acting on it B) in inverse proportion to the force acting on it C) exponentially as the force changes D) quadratically as the force changes