Post a New Question

college physics

posted by .

A 55 kg engineer leaves her office on the 33rd floor of a skyscraper and takes an elevator to the 59th floor. Later she descends to street level. If the engineer takes her office as the zero for potential energy and if the distance from one floor to the next is 3.5 m, what is the engineer’s potential energy (a) in her office, (b) on the 59th floor, and (c) at street level?

  • college physics -

    To quote one of our very good math and science tutors: “You will find here at Jiskha that long series of questions, posted with no evidence of effort or thought by the person posting, will not be answered. We will gladly respond to your future questions in which your thoughts are included.”

  • college physics -

    mass m = 55 kg
    Distance from one floor to the next h =3.5 m
    (a). Potential energy in her office P= mg * 0 = 0 J
    Since her office as the zero potential energy
    (b). Potential energy on the 59 th floor = mg ( 59 th floor -33 floor )
    = mg * 26 floors
    = mg * 26 h
    = 55*9.8 * 26 * 3.5
    = 49049 J
    (c). Potential energy at strret level = mg ( 0 thfloor - 33 floor )
    = mg * -33 floors
    = mg * -33h
    = 55*9.8 * -33 * 3.5
    = - 62254.5J

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    I just need help with part c. I know stopping takes longer but we have to explain why. A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. The scale reads 849 N. (a) As the elevator moves up, …
  2. physics

    It takes the elevator in a skyscraper 3.6 s to reach its cruising speed of 10 m/s. A 69 kg passenger gets aboard on the ground floor. 1.What is the passenger's weight before the elevator starts moving?
  3. physics

    It takes the elevator in a skyscraper 4.0 to reach its cruising speed of 10 . A 60 passenger gets aboard on the ground floor.What is the passenger's apparent weight while the elevator is speeding up?
  4. equations

    you decide to ride ann elevator until it takes you to the ground floor withour pushing any buttons the elevator takes you up 4 floors down 6 floors up 1 floor down eight floors down 3 floors up 1 and then down six floors to ground …
  5. physics

    In a large hotel, a fast elevator takes you from the ground floor to the 21st floor. The elevator takes 17 s for this trip: 5 s at constant acceleration, 7 s at constant velocity, and 5 s at constant deceleration. Each floor in the …
  6. math

    one elevator leaves first floor of a building at 9:00 a.m. It takes 5 seconds to travel between floors, stays 10 seconds at each floor and stops at each floor on its way to the top. Another elevator leaves the 12th (top) floor at 9:00 …
  7. Physics

    Calculate the change in potential energy of a 86.9 kg man when he takes an elevator from the first floor to 15th floor, if the distance between floors is 4.47 m. *This building has a thirteenth floor! Keep in mind that he stands on …
  8. Math

    An elevator starts on the 100th floor of a building. It descends 4 floors every 10 seconds. At what floor will the elevator be 60 seconds after it starts?
  9. physics

    It takes the elevator in a skyscraper 4.5s to reach its cruising speed of 11m/s . A 70kg passenger gets aboard on the ground floor. What is the passenger's weight before the elevator starts moving?
  10. Saint Joseph's high school

    An elevator can lifts 10 people up 12 floors. Each person weighs approximately 60 kg. each floor is 3m high, and it takes 15s to reach the 12th floor from the ground floor without stopping. How much work does the elevator do?

More Similar Questions

Post a New Question