the two ropes are used to vertically lower a 255 kg piano from exactly 4 m form a seocnd sotry window to the ground how much work is done by each of the three forces

Complete Question

The Question diagram is attached below

a)  

b)  

c)  

Explanation:

From the question we are told that:

Mass

Distance

Generally the equation for Work done is mathematically given by

For

For

For

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.

there are no contact forces mentioned on the list of choices that you've provided.