I have a formula here that might just help you solve the problem on your own:
The number of images depends on the angle between the two mirrors. The number of images formed in two plane mirrors inclined at an angle A to each other is given by the formula:
Number of images = 360<span>/A - 1.
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I hope my guide has come to your help. God bless and have a nice day ahead!
To solve this problem it is necessary to apply the equations related to the description of the tangential and angular movement.
The displacement where the speed and acceleration is related is given by the equation:
Where
Initial velocity (0 because start from rest)
t = time
a = Acceleration
We have angular acceleration but not tangential acceleration. Tangential acceleration can be obtained through the relationship
And we have also that the displacement is
Now replacing,
Therefore will take the cord to unwind around 10s
Work done = force x distance
= 2500 N x 2.5
= 6,250 Joules of work done.