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Physics
ENERGY PROBLEMS When work is done on or by a system
Ex 1) An object slides across a horizontal table which changes its kinetic energy from 20 J to 18 J in 2 sec. What work does the object do against friction?
Wf = 2 J
Joule Paddle Conservation of Energy
Harper's New Monthly Magazine, No. 231, August, 1869.
Joule Paddle
Work Energy Relationship
The work done on or by a system = ΔKE + ΔPE + Wf
Wf - work done against friction
If ΔPE of yellow box = 30 J,
Enrichment Superfluids The strange behavior of liquid helium BBC
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