- #1
foggyeyes
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I have a cuboidal object of dimensions 15cm x 7cm x 10cm.
Its volume is 1050 cm3
Since density of water, is 1g cm-3, the object will have to weigh 1.05 Kg to sink.
Assuming it sinks to the bottom and weighs 1.1Kg, and has to be lifted by 4, electric DC Motors.
Will the motors have to exert enough force to lift the WHOLE 1.1 Kg, or Do they have to lift 1.1 Kg - 1.05 Kg, ie. 0.6 Kg.
Its volume is 1050 cm3
Since density of water, is 1g cm-3, the object will have to weigh 1.05 Kg to sink.
Assuming it sinks to the bottom and weighs 1.1Kg, and has to be lifted by 4, electric DC Motors.
Will the motors have to exert enough force to lift the WHOLE 1.1 Kg, or Do they have to lift 1.1 Kg - 1.05 Kg, ie. 0.6 Kg.