Alarge bedsheet is held vertically by two students. a third student, who happens to be the star pitcher on the baseball team, throws a raw egg at the sheet. explain why the egg does not break when it hits the sheet, regardless of its initial speed. (if you try this, make sure the pitcher hits the sheet near its center, and do not allow the egg to fall on the floor after being caught.)

Explanation:

The egg does not break when it hits sheet because it get sufficient time to slow down as the sheet bend inside and apply a force which gradually slows down the egg and Prevent it From Breaking .

The average value of that force is given by  

where change in momentum

time over which this Process occur    

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

we need to know the time interval during which the force acts. impulse of force = momentum change