A passenger with a mass of 120 kg rides an elevator that accelerates upward with an acceleration of 2 m/2^2. How heavy does the passenger feel?
A lady with a mass of 75 kg rides an elevator that is accelerating downward at 1.5 m/s^2. How light does she feel?
Please help with these two questions !
Formula, and detailed steps please (:
A lady with a mass of 75 kg rides an elevator that is accelerating downward at 1.5 m/s^2. How light does she feel?
Please help with these two questions !
Formula, and detailed steps please (:
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The passenger's weight is the force of the normal under his feet.
Support force for the gravity force ( 120 . 9.8 ) plus the accelerating force (120 . 2 ) means total push from the ground is 1416 N.
That is the weight he would feel.
It is the equivalent of having a mass of 144.5 kg while standing still.
Downward force of gravity = 75 . 9.8 . Some of this is "used" to accelerate her downwards ( 75 . 1.5 ) . So the remaining downward force on her, her weight = 75 . 8.3 = 622.5 N ( which is the equivalent of a mass of 63.5 kg standing still.
Support force for the gravity force ( 120 . 9.8 ) plus the accelerating force (120 . 2 ) means total push from the ground is 1416 N.
That is the weight he would feel.
It is the equivalent of having a mass of 144.5 kg while standing still.
Downward force of gravity = 75 . 9.8 . Some of this is "used" to accelerate her downwards ( 75 . 1.5 ) . So the remaining downward force on her, her weight = 75 . 8.3 = 622.5 N ( which is the equivalent of a mass of 63.5 kg standing still.