Question

A block of mass 5kg is being raised vertically upwards by the help of string attached to it.it rises with an acceleration of m/s².find the work done by the tension in the string if the block rises by 2.5m.

Answer 1

look its super easy!!.. 
 
let h be height m me the mass and g be the acceleration due to gravity.

then we know work done(w) =mgh 
 so Work done=5*10*2.5

Answer 2

125 is the work done of the question