Work done is zero when force acts right angle to the direction of the motion of the body .
my situation of zero work done , one day i hold many books approximately 15 after some time i feel very tired but there is a physical work done is zero because i worked against right angle .
i feel actual work is done because when i holding book my muscles and blood circulate all over the body so i feel work is done.
Arshad Quraishi
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If work is done on the system then it has a negative sign. If work is done by the system then it has a positive sign.
Anything multiplied by zero is is zero. So, this would also work for this particular equation. 8 multiplied by 0 is o.
There was 12k Joules of work done.
It´s a system that forces to zero values smaller than a given value. This is done in order to avoid measure or report very small values seen as noises.
all our work is done