A 2-kg box of taffy candy has 40 J of potential energy relative to the ground. Its height above the ground is
A) 1 m.
B) 2 m.
C) 3 m.
D) 4 m.
E) none of the above
Answer: B
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A meter stick with a mass of 89.5 g is being supported at the 50.0 cm mark by a pivot that is 1.00 cm above the center of mass of the meter stick. The moment of inertia of the stick about that point is 0.00746 kg?m2
What is the period of oscillation of this system? A) 2.01 s B) 2.41 s C) 5.79 s D) 2.89 s E) 4.02 s
The boundary between two air masses is called a
a. squall line. b. blizzard. c. tornado. d. front.
If an atom has 104 electrons, 157 neutrons, and 104 protons, what is its approximate atomic mass?
A) The approximate atomic mass is 365. B) The approximate atomic mass is 261. C) The approximate atomic mass is 157. D) The approximate atomic mass is cannot be determined with the information given.
Two people are lifting a 2.0-m wide, 80-kg, office desk by the ends. One side is heavier than the other, and it is found that the person exerting the larger force is exerting a vertical force of 500 N
How far from that person is the center of mass of the desk? A) 0.73 m B) 1.3 m C) 1.4 m D) 0.58 m E) 1.0 m