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A crate, of mass 15 kg, is placed on the floor of a lift. Calculate, in newtons, the...

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saj-94 | (Level 1) Salutatorian

Posted August 12, 2013 at 3:19 AM via web

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A crate, of mass 15 kg, is placed on the floor of a lift. Calculate, in newtons, the magnitude of thereaction of the floor on the crate,

when the lift is descending with a retardation of 2ms–2,

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jeew-m | College Teacher | (Level 1) Educator Emeritus

Posted August 12, 2013 at 3:27 AM (Answer #1)

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Please refer the attached image.

We can use the Newton’s law motion here,

`darrF=ma`

`15g-R=15(-2)`

`R=15g+15xx2`

 ` R =177.15N`

So the reaction on crate from the flow is 177.15N

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