A woman stands on a bathroom scale in a motionless elevator. When the elevator b

Question

A woman stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.79 of her regular weight.

Part A

Calculate the magnitude of the acceleration of the elevator.

Express your answer to two significant figures and include the appropriate units.

Part B

PLEASE SHOW WORK. ONCE YOU GIVE A EQUATION PUT ALL THE NUMBERS IN PLEASE DON'T JUST GIVE ME A EQUATION AND AN ANSWER. THANK YOU!

A woman stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.79 of her regular weight.

Part A

Calculate the magnitude of the acceleration of the elevator.

Express your answer to two significant figures and include the appropriate units.

Part B

Find the direction of the acceleration. Upward Downward

PLEASE SHOW WORK. ONCE YOU GIVE A EQUATION PUT ALL THE NUMBERS IN PLEASE DON'T JUST GIVE ME A EQUATION AND AN ANSWER. THANK YOU!

Explanation / Answer

bathroom scale measures the normal reaction.

so N = 0.79mg

now using Fnet = ma in vertical downward direction,

Fnet = mg - N = ma

mg - 0.79mg = ma

a = 0.21 x 9.81 = 2.06 m/s^2

B) downwards

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