211 (S07) Make-up quiz - MCb2

211 (S07) Make-up quiz - MCb2 - Multiple Choice 5 Questions...

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Multiple Choice –  5 Questions                    x 2pts =                  Please write your answers in the space provided. # correct score 1. A massless string exerts a horizontal force of 60 Newtons on a 4-kg box. This causes the box to slide across a level floor and speed up with an acceleration of 3 m/s 2 . The friction force acting on the box (in Newtons) is: A. 0 B. 12 C. 15 D. 48 E. 72 2. Greg drops off a bridge with a bungee cord attached to his feet. Which of the following best describes the net force acting on Greg during the time that his motion is being slowed by the bungee cord? A. constant magnitude and directed downward B. increasing magnitude and directed upward C. decreasing magnitude and directed upward D. increasing magnitude and directed downward E. decreasing magnitude and directed downward 3. A block slides down  an incline at constant  speed.  Which of the following  statements  is true   of the block-earth  system? A. The mechanical energy is conserved  but the kinetic energy is not conserved.
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This document was uploaded on 10/29/2011 for the course PHSX 211 at MSU Bozeman.

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