The angle that a swinging simple pendulum makes with the vertical obeys the equation
(t) = (0.150 rad) cos(2.85 rad/s)t + 1.66.
(a) What is the length of the pendulum?
A) 0.15 m
B) 0.83 m
C) 1.21 m
D) 2.02 m
E) It cannot be determined from the information given.
(b) What is the mass of the swinging bob at the end of the pendulum?
A) 2.85 kg
B) 1.66 kg
C) 0.454 kg
D) 0.150 kg
E) It cannot be determined from the information given.
Question 2
A spherical ball of lead (density 11.3 g/cm3 ) is placed in a tub of mercury (density 13.6 g/cm3). Which answer best describes the result?
A) The lead ball will float with about 83 of its volume above the surface of the mercury.
B) The lead ball will float with its top exactly even with the surface of the mercury.
C) The lead ball will float with about 17 of its volume above the surface of the mercury.
D) The lead will sink to the bottom of the mercury.
E) none of the above
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