A man in a gym is holding an 8.0-kg object at arm's length, a distance of 0.55 m from his shoulder joint. What is the torque about his shoulder joint due to the object if his arm is held at 30° below the horizontal?
A) 22 N ? m
B) 2.2 N ? m
C) 4.4 N ? m
D) 13 N ? m
E) 37 N ? m
E
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Conversion of Units: The peak of Mt. Everest, at 10,900 m, is the highest point above sea level in the world. What is its elevation in miles? (1.00 m = 3.281 ft)
A. 17.6 mi B. 0.630 mi C. 6.77 mi D. 6.20 mi E. 67.1 mi
A 3.00 kg mass is located at x = 2.0 cm and y = -4.0 cm. A 3.00 kg mass is located at x = -5.0 cm and y = 2.0 cm. A 4.00 kg mass is located at x = -3.0 cm and y = -3.0 cm. Where is the location of the center of mass (x, y)?
A. (-0.10 cm, -0.50 cm) B. (-2.1 cm, -1.8 cm) C. (+2.1 cm, -1.8 cm) D. (-2.1 cm, +1.8 cm) E. (+1.1 cm, -2.0 cm)
What is the inductance of a series RL circuit in which R = 1.0 K? if the current increases to one-third of its final value in 30 ?s?
A. 74 mH B. 99 mH C. 49 mH D. 62 mH E. none of the above
In a nuclear plant, 1017 J of energy is available from mass conversion. How much mass was lost?
A) 0.1 kg B) 1 kg C) 10 kg D) 100 kg E) 1000 kg