A solid uniform sphere of mass 120 kg and radius 1.7 m starts from rest and rolls without slipping down an inclined plane of vertical height 5.3 m. What is the angular speed of the sphere at the bottom of the inclined plane?
A) 5.1 rad/s
B) 8.7 rad/s
C) 9.7 rad/s
D) 6.1 rad/s
A
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A very light ideal spring stretches by 21.0cm when it is used to hang a 135-N object. What is the weight of a piece of electronic equipment that would stretch the spring by 44.9cm if you hung the equipment using the spring?
A) 405 N B) 289 N C) 176 N D) 63 N
A circuit consists of three identical lamps connected to a battery as in Figure OQ28.14. The battery has some internal resistance. The switch S, originally open, is closed. What happens to the potential difference across lamp A?
A 2.5-kg object falls vertically downward in a viscous medium at a constant speed of 2.5 m/s. How much work is done by the force the viscous medium exerts on the object as it falls 80 cm?
a. +2.0 J b. +20 J c. -2.0 J d. -20 J e. +40 J
Refer to the graph. The magnitude of the acceleration of the object is largest
A. in region A. B. in region B. C. in region C. D. The object does not accelerate