a) What is the persons

Anish Buchanan
2021-03-09
Answered

A person stands on a scale inside an elevator at rest. The Scale reads 800N.

a) What is the persons

a) What is the persons

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Khribechy

Answered 2021-03-10
Author has **100** answers

mass m=

= weight/acceleration due togravity

Key idea is the scale reading is equal to the magnitude of normal force N on the passenger from the scale.

This tells us that the scale reading , which is equal to N depends on the vertical acceleration a of the cab. Substituting mg for Fg gives us N = mg +ma = m (g+a)

For any choice of acceleration. a. if it accelerates up the weight will be more because a +ve

if it accelerates downward then weight will decrease because a is - ve then.

If moving with constant speed a =0 so the weight will remain the same as 800N

When suddenly accelates up let us say acceleration = a

Then scale reads m(g + a) = 81.83( 9.8 +a)

When it is moving with constant speed means not moving with any additional acceleration . a = 0

Scale reading = mg = 800N

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