1. A 100 N weight is supported by two wires A and B as shown. What can you conclude about the tensions in these wires? A. The tensions are equal but greater than 50 N each.
B. The tensions are equal but less than 50 N each.
C. The tensions are equal to 50 N each.
D. The tensions are equal to 100 N each.

2. An 1130 kg car is held in place by a light cable on a very smooth (frictionless) ramp, as shown. The cable makes an angle of 31° above the surface of the ramp, and the ramp itself rises at 25° above the horizontal. How hard does the surface of the ramp push on the car? To solve, make sure to find the tension in the cable first.

A. 5460 N
B. 7000 N
C. 8750 N
D. 7220 N

3. Find the tension in cord A in the figure if the weight of the suspended object is 250 N.
A. 183 N
B. 366 N
C. 224 N
D. 276 N

4. A man pushes on a piano of mass 180 kg so that it slides at a constant velocity down a ramp that is inclined at 11° above the horizontal. No appreciable friction is acting on the piano. Calculate the magnitude and direction of this push if the man pushes parallel to the incline.

A. 34.3 N up the incline
B. 337 N down the incline
C. 337 N up the incline
D. 34.3 N down the incline

5. A tetherball leans against the smooth, frictionless post to which it is attached as shown. The rope is attached to the ball such that a line along the rope passes through the center of the ball. If the rope is 1.4 m long and the ball has a radius of 0.110 m with mass 0.270 kg, what is the tension in the rope?

A. 0.193 N
B. 3.7 N
C. 3.54 N
D. 2.65 N

6. When the thigh is fractured, the patient’s leg must be kept under traction. One method of doing this is with a modified Russell traction apparatus, as shown. If the physical therapist specifies that the traction force directed along the leg must be 25 N, what should w be?

A. 15 N
B. 25 N
C. 30 N
D. 35 N