a 45kg box of books is lifted o a bookself 1.75 m above the floor. how much work was done to lift the books?
1 answer:
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Least count of the pulse stopwatch is given by
this means each division of the stopwatch will measure 0.1 s of time
After 3 journeys from one end to other we can see that total time that is measured here is shown by the clock as 52nd division
So here total time is given as
Time = (Number of division) (Least count)
now we will have