Question #05f5e

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Answer 1 · 2017-04-07T21:13:04

$a=4.24" "m/s^2, " direction:downward"$

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$"while elevator is stops ,bathroom scale show only the weight of man."$

$G=m*g=691" "N$

$"The tension on cable is the sum of the man's and the elevator's weights."$

$"Tension="G+G_("elevator")$

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$"When the elevator is accelerated downwards, there is an "$
$"inertia force in the reverse direction."$

$"This inertial force reduces the weight on the bathroom scale."$

$"inertial force=691-499=299" "N$

$"Now ,let use the Newton's second law of motion."$

$F=m*a$

$m:"mass of man"$

$a:"acceleration"$

$299=691/(9.81)*a$

$a=(299.9.81)/691$

$a=4.24" "m/s^2$