- #1
alexas
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Homework Statement
Zach, whose mass is 78 kg, is in an elevator descending at 11 m/s. The elevator takes 3.2 s to brake to a stop at the first floor.
What is Zach's weight before the elevator starts braking?
What is Zach's weight while the elevator is braking?
Homework Equations
F = mg
F = ma ??
The Attempt at a Solution
What is Zach's weight before the elevator starts braking?
I was thinking...
F = mg
So F = (78kg)*(11m/s) ?
The second question i was completely clueless on...
but an idea of mine was...
F = ma
a = (11m/s)/(3.2s) = 3.4375 m/(s^2)
F = (78kg)(3.4475) ?