1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
charle [14.2K]
3 years ago
6

Calculate the change in potential energy of a 91.2 kg man when he takes an elevator from the first floor to 37th floor, if the d

istance between floors is 3.99 m.
Physics
1 answer:
MAXImum [283]3 years ago
3 0

Answer:

128379.69 J

Explanation:

Potential energy: This can be defined as the energy of a body to to position in the gravitational field. The S.I unit of potential energy is Joules (J).

The expression for potential energy is given as,

ΔEp  = mgΔH

ΔEp = mg(H₂-H₁)..................... Equation 1

Where ΔEp =change in  Potential Energy, m = mass of the man, g = acceleration due to gravity, H₂ = Height of the 37th floor, H₁ = height of the first floor

Given:m = 91.2 kg, g = 9.8 m/s², H₁ = 3.99 m, H₂ = 3.99×37 = 147.63 m.

Substitute into equation 1

ΔEp = 91.2(9.8)(147.63-3.99)

ΔEp = 893.76(143.64)

ΔEp = 128379.69 J.

You might be interested in
Which of the following accurately describes the behavior of these two mechanical waves when they intersect?
Lerok [7]
D because I learned this 2 years ago
5 0
3 years ago
Why do skiers often wear sunglasses while they are skiing
yulyashka [42]
There is a lot of glare off of the ice, due to the sun and it also is always good to have eye protection in case you fall face first :P
4 0
3 years ago
Read 2 more answers
What is special about decomposers? *
Bogdan [553]
D. They are heterotrophs that digest food internally.
5 0
3 years ago
Please i need detailed explanation​
zubka84 [21]

Answer:

2Micro Farahds

Explanation:

Its in the picture.

I Hope it helps.

4 0
2 years ago
On a hot summer day in the state of Washington while kayaking, I saw several swimmers jump from a railroad bridge into the Snoho
Svetlanka [38]

Answer: part a: 19.62m

part b: 19.62 m/s

part a: 2.83 secs

Explanation:If the air resistance is ignored then the swimmer experience free fall under gravity hence

u=0

a=9.81 m/s2

t=2 secs

s=ut+0.5at^2

s=h

h=0*2+0.5*9.81*2^2\\h=19.62 meters

Part b

v=u+at\\v=0+9.81*2\\v=19.62m/s

Part c

now we have h=2*19.62=39.24

39.24=0+0.5*9.81*t^2\\t^2=8\\t=2.83 secs

4 0
3 years ago
Other questions:
  • When jogging outside you accidently bump into a curb. Your feet stop but your body continues to move forward and you end up on t
    5·2 answers
  • When Kevin pulls his cotton shirt off his body, the electrons get transferred from the (shirt or body) to the (shirt or body) .
    13·1 answer
  • How many galaxies are present in the observable universe?
    8·2 answers
  • The pressure at a point on a sloping surface within a tank filled with liquid depends on the
    8·1 answer
  • Explain how an object can have force acting on it but not be acceleration?
    5·1 answer
  • A wire, of length L = 4.1 mm, on a circuit board carries a current of I = 1.96 μA in the j direction. A nearby circuit element g
    13·1 answer
  • Which method best helps to prevent wind erosion?
    6·2 answers
  • Being willing to sincerely apologize for mistakes errors and blunders goes a long way toward
    9·1 answer
  • The p-type or N-type semiconductor is not of practical use. Why?​
    8·1 answer
  • When a force is applied to a wheel, its axle exerts a greater force?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!