Check Your Understanding
316.7 g; 5.8 N
711.0 N; 466.0 N
1167 N; 980 N directed upward at above the horizontal
Fluids have different mechanical properties than those of solids; fluids flow.
magnitude and direction of the force, and its lever arm
True, as the sum of forces cannot be zero in this case unless the force itself is zero.
False, provided forces add to zero as vectors then equilibrium can be achieved.
It helps a wire-walker to maintain equilibrium.
In contact with the ground, stress in squirrel’s limbs is smaller than stress in human’s limbs.
It acts as “reinforcement,” increasing a range of strain values before the structure reaches its breaking point.
right cable, 444.3 N; left cable, 888.5 N; weight of equipment 156.8 N; 16.0 kg
784 N, 376 N
a. 539 N; b. 461 N; c. do not depend on the angle
tension 778 N; at hinge 778 N at above the horizontal; no
1500 N; 1620 N at
a. at corner 66.7 N at with the horizontal; at floor 192.4 N at with the horizontal; b.
a. b. c. 11.0 mm, 31.4 mm