PHYSICS MIDDLE SCHOOL

6. A 73-kg woman stands on a scale in an elevator. Thescale reads 810 N. What is the magnitude and
direction of the elevator's acceleration?

A. 0.23 m/s2 up
B. 1.3 m/s2 up
C. 6.5 m/s2 down
D. 11 m/s2 down

Answers

Answer 1
Answer:

The magnitude and direction of the elevator's acceleration would be 1.296 ms^(-2) \: upward

Given the Parameters :

  • Scale, reading, N = 810 N

  • Mass, m = 73 kg
  • Acceleration due to gravity, g = 9.8 m/s²

The Normalforce can be calculated using the relation :

N = mg + ma

N = m(g + a)

g + a = (N)/(m)

a = (N)/(m) - g

Substituting the Parameters into the equation :

a = (810)/(73) - 9.8

a = 11.0959 - 9.8

a = 1.296 ms^(-2)

Scale reading > weight of woman (73 × 9.8)

810 < 715.4 (acceleration will be upward)

Therefore, the acceleration of the elevator would be a = 1.296 ms^(-2) \: upward

Learn more :brainly.com/question/18266310
Answer 2
Answer:

Answer:

b

Explanation:

n = m(g +a)

n= normal force (N)

m=mass (kg)

g=acceleration of gravity

a= acceleration of elevator

rearrange:

a= n/m - g

a= (810 N/73 kg) - 9.8 m/s ^2

a= 1.3 m/s ^2 up

and the acceleration is upwards bc her weight is less than the scale reading

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A mechanical wave is created when a source of energy causes a vibration to travel through a medium 

And yeah lol 
A mechanical wave is a disturbance in matter that carries energy from one place to another :) 

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