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Unformatted text preview: PHYS171 Exam 2 practice Fall 2011 Name: _____________________ Student ID #: ________ Short Answer Questions 1) You take an elevator ride to higher floor. Your apparent weight is maximum (a) as the elevator starts moving (b) as it continues moving upward (c) as it comes to a stop (d) more information is needed. [5 points] 2) You decide to hang a lamp from a pair of cables instead of a single cable. The tension on each of the two cables shown (a) is greater than the tension in a single cable holding up the mass, (b) is less than the tension in a single cable (c) is equal to the tension on a single cable (d) depends on the mass. Why? [5 points] 3) A basketball player leaps into the air and before landing throws the basketball upwards towards the basket. As a result of throwing the ball (a) the player remains in the air longer (b) the player remains in the air for the same time interval (b) the player remains in the air for a shorter time interval. (5 points) 4) A bacteria can swim at 5 micrometers per second. What is the propulsion force necessary to sustain this speed. Assume the bacteria can be modeled as a sphere with radius 1 micrometers and that it swims in water. (10 points) radius 1 micrometers and that it swims in water....
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This note was uploaded on 12/29/2011 for the course PHYSICS 171 taught by Professor La porta during the Fall '11 term at Maryland.
- Fall '11
- LA PORTA