The efficiency of a light bulb is the ratio of the:
a. heat plus electricity produced to the electrical input
b. voltage output of the bulb to the power input
c. energy into the bulb to the energy out of the bulb
d. light output to the electrical energy input
Question 2
A carnival Ferris wheel has a 15-m radius and completes five turns about its horizontal axis every minute. What is the acceleration of a passenger at his lowest point during the ride?
a. 5.7 m/s2 downward
b. 4.1 m/s2 upward
c. 14 m/s2 downward
d. 4.1 m/s2 downward
e. 19 m/s2 downward
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