You’re called to testify in a product liability lawsuit. An infant sitting in the portable seat shown in Fig. 12.36 was injured when it fell to the floor. The manufacturer claims the child was too heavy for the seat: the parents claim the seat was defective. Tests show that the seat can safely hold a child if the force F → of the table on the chair doesn’t exceed 229 N. The seat’s mass is 2.0 kg, the injured child’s is 10 kg, and the center of mass of child and seat was 16 cm from the table edge. In whose favor should the jury rule? FIGURE 12.36 Problem 60
You’re called to testify in a product liability lawsuit. An infant sitting in the portable seat shown in Fig. 12.36 was injured when it fell to the floor. The manufacturer claims the child was too heavy for the seat: the parents claim the seat was defective. Tests show that the seat can safely hold a child if the force F → of the table on the chair doesn’t exceed 229 N. The seat’s mass is 2.0 kg, the injured child’s is 10 kg, and the center of mass of child and seat was 16 cm from the table edge. In whose favor should the jury rule? FIGURE 12.36 Problem 60
You’re called to testify in a product liability lawsuit. An infant sitting in the portable seat shown in Fig. 12.36 was injured when it fell to the floor. The manufacturer claims the child was too heavy for the seat: the parents claim the seat was defective. Tests show that the seat can safely hold a child if the force
F
→
of the table on the chair doesn’t exceed 229 N. The seat’s mass is 2.0 kg, the injured child’s is 10 kg, and the center of mass of child and seat was 16 cm from the table edge. In whose favor should the jury rule?
The system is in equilibrium. A concrete block of mass 225 kg hangs from the end of the uniform strut of mass 45.0 kg. A cable runs from the ground, over the top of the strut, and down to the block, holding the block in place. For angles f = 30.0° and u = 45.0°, find (a) the tension T in the cable and the (b) horizontal and (c) vertical components of the force on the strut from the hinge.
Two ladders, 4.00 m and 3.00 m long, are hinged at point A and tied together by a horizontal rope 0.90 m above the floor. The ladders weigh 480 N and 360 N, respectively, and the center of gravity of each is at its center. Assume that the floor is freshly waxed and frictionless. (a) Find the upward force at the bottom of each ladder. (b) Find the tension in the rope. (c) Find the magnitude of the force one ladder exerts on the other at point A. (d) If an 800-N painter stands at point A, find the tension in the horizontal rope.
A spade is modelled as a uniform rod, of mass 2kg and length 90cm, attached to a uniform square lamina, of side 20cm and mass 0.5kg. A gardener holds the spade horizontally with hands 30cm and 60cm from the end of the rod. Find the vertical forces exerted by the gardener's hands.
Im stuck on this q, pls help.
Chapter 12 Solutions
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