Physics, 27.10.2020 16:20 barbaramathews1123

Escalator The escalator takes 20 seconds to carry the man between the two floors. The useful work done
against gravity is W. The useful power developed is P.
The lift takes 30 seconds to carry the same man between the same two floors.
How much useful work against gravity is done by the lift, and how much useful power is
developed by the lift?
useful work
done against
gravity by lift
useful power
developed by lift

Answers: 2

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Escalator The escalator takes 20 seconds to carry the man between the two floors. The useful work d...