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Unformatted text preview: Downward because the force of gravity downward is stronger at that point then the force of the elevator on you upward. 40. Pat and Chris are pushing identical crates across a rough floor. Pat’s crate is moving at a constant 1m/s while Chris’ is at a constant 2m/s. Compare the net forces on the two crates. Pat’s box has a net force of the mass of the box (X kg) times the acceleration (1m/s → ) or Xkg • 1m/s → . Chris’ box on the other hand has a net force of Xkg • 2m/s. Therefore Chris must exert double the force that Pat must. 44. You find that you must push with a force of 10N to keep a jar of cold cream sliding at a contant speed across your bathroom counter. With the jar t rest, you apply a force of 11N. Is it possible that the jar will stay at rest? Explain. Yes, because the initial force to push the jar may be higher than the overall net force needed to push it....
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This note was uploaded on 04/21/2008 for the course PSCI 110 taught by Professor Porter during the Fall '07 term at Eastern Michigan University.
- Fall '07