You are standing on a bathroom scale in an elevator in a tall building. Your mass is 64 kg. The elevator starts from rest and travels upward with a speed that varies with time according to . When t = 4.0 s, what is the reading on the bathroom scale?
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You stand on a bathroom scale that rests on the floor of anelevator. (Don't ask why!) Standing on the scale compressesinternal springs and activates a dial that indicates your weight innewtons. When the elevator is at rest, the scale reads 600 N. Thenthe elevator begins to move upward with a constant acceleration of2.00 m/s/s.Determine your true mass.Determine the scale reading while the elevator isaccelerating.If you read the scale without realizing that it is acceleratingupward what might you think your mass is?What would your answers be if the elevator is acceleratingdownward?
A 75.0-kg man stands on a bathroom scale in an elevator that accelerates from rest to 30.0 m/s in 2.00 s.
(a) Calculate the scale reading in newtons and compare it with his weight. (The scale exerts an upward force on him equal to its reading.)
(b) What is unreasonable about the result?
(c) Which premise is unreasonable, or which premises are inconsistent?
