P123_F08_FE

# P123_F08_FE - Physics 123 Analytical Physics FINAL EXAM...

• Notes
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1. Why do raindrops fall with constant speed during the later stages of their descent? a) The gravitational force is the same for all drops. b) The force from air resistance just balances the force of gravity. c) The drops all fall from the same height. d) The force of gravity is negligible for objects as small as raindrops. e) Gravity can not increase the speed of a falling object to more than 9.8 m/s. 2. A 100-kg stoplight hangs from the midpoint of a cable strung between two poles. Each half of the cable makes an angle of 3 with the horizontal.. The tension in each half of the cable is a) depends on the distance between the poles b) 1900 N c) 950 N d) 18.6 kN e) 9.4 kN 3. A small car has a mass of 1000 kg, and an SUV has a mass of 2000 kg. They both have the same coefficient of kinetic friction with the road when sliding while braking. Starting at the same initial velocity, both vehicles brake suddenly, eventually they come to rest when sliding stops. Which statement is true?
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• Fall '08
• WENKSTERN

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