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Mechanics
Work power and energy
Question posted by user : Shaydeen
Genetics and inheritance
How to do genetic cross
Question posted by user : Sfundo
Genetics and inheritance
How to do genetic cross
Question posted by user : Sfundo
Work
In physics we say work is done on a body if a force is acting on it and the body moves to the direction of the force.
We also say that positive work is the work done on the system and negative work is the work done by the system.
Hence work done by the system to overcome friction is always negative.
Am I wrong if I say work done by frictional force on the object is zero because the object does not more to the direction of friction force??
Question posted by user : Sandile
electromagnetic radiatio
Why is UV lights damaging to one's eyes
Question posted by user : Nabeelah