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
Monica [59]
3 years ago
8

A 50 kg person is standing on a bathroom scale in an elevator moving upward.

Mathematics
1 answer:
Andreas93 [3]3 years ago
4 0
The scale reads the Normal (reaction) force.

a) Upward acceleration

Balance of forces on the scale: Normal - Weight = ma

Normal = 56kg*g
Weight =50*g
ma = 50*a

56*g - 50*g =50*a => a =[ 56*g* - 50*g ] / 50 = 0.12*g =0.12*9.8m/s^2 =

a = 1.176 m/s^2


b) Downward acceleration

Weight - Normal = ma

=> Normal = Weight - m.a

Normal = 50*9.8m/s^2 -  50*1.176m/s^2 = 431.2 N

Scale reading: 431.2 N/ 9.8 N/m = 44 kg.
You might be interested in
How would I know what lines are intersecting, perpendicular, parallel and coinciding based off an equation given? Like in the pi
NikAS [45]
If lines are paralel, then they have the same slope
if the lines are pependicuilar, the slopes mutiply to -1

so

y=mx+b
m=slope

and
ax+by=c
-a/b is the slope

given
y=2/3x-2
slope is 2/3

x+y=4
slope is -1/1 or -1

2/3≠-1 and -1 times 2/3≠-1 so they are neither perpendicular or paralell

since they aren't paralell, we know they intersect somewhere
8 0
3 years ago
Use the graph to find out over what interval f(x) is less than or equal to 0. PLEASE HELP ASAP!!!
jok3333 [9.3K]

Answer:

[-5, 2]

Step-by-step explanation:

We have to find the interval for which f(x) <= 0, the interval is [-5, 2].

5 0
2 years ago
Sheila purchased ski equipment for $513 using a six-month deferred payment plan. The interest rate after the introductory period
klemol [59]

$65 * 6 = $390 total monthly payments made

The downpayment made is $125, so the total balance at the end is:

balance = $513 – ($125 + $390)

balance = - $2

 

<span>There is an excess of 2 dollars at the end.</span>

4 0
3 years ago
the lengths of the sides of a triangle are in the ratio of 5:3:4. The perimeter of the triangle is 156cm. Find the length of the
lisabon 2012 [21]
The longest side is 5/(5+3+4) = 5/12 of the perimeter, hence
  (5/12)*156 cm = 65 cm . . . . . the length of the longest side
4 0
3 years ago
Simplify 3(x+2)-9x+5
Nimfa-mama [501]
It would be...
-6x+11
6 0
3 years ago
Read 2 more answers
Other questions:
  • Find the area of the part of the sphere x2 + y2 + z2 = 100z that lies inside the paraboloid z = x2 + y2.
    8·1 answer
  • $6.59 is 25% of what numbers?
    14·1 answer
  • Find the slope of a line perpendicular to y=-2/5x+4/5.
    9·1 answer
  • Acie is filing his federal income tax return with the 1040EZ form, and he
    11·1 answer
  • Show me picture of geomentry angles
    12·1 answer
  • If a line goes through the following two points: (0,-2) and (3,4), the slope of the line is:
    15·1 answer
  • Choose all of the equations for which x = 1/2 is a solution
    8·2 answers
  • The formula for the area of a square is A=s? where s represents the side length of a square. If the side length of the square is
    9·1 answer
  • Find the length of side AB. Round your answer to the nearest tenth:
    15·1 answer
  • n the month of June, the temperature in Johannesburg, South Africa, varies over the day in a periodic way that can be modeled ap
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!