Need help this is timed
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Length of the sheet is given as
width of the sheet is given as
now let say its thickness is "t"
so the volume of the sheet is given as
mass of the sheet is given as
now we have
by solving above we have
so the thickness of sheet will be above
To calculate the average acceleration of the ball we use the formula,
Here, is the final velocity of the ball and
is the initial velocity of the ball t is the time in contact with the wall.
Given towards the wall and
away from the wall and .
Substituting these values in above formula , we get
Here is negative because ball is moving away from the wall.
Therefore, average acceleration of the ball is (away from the wall).