The concept used to solve this problem is momentum change.
Initially, the change in momentum can be calculated by substituting the value of the mass and the velocity. Later, the force exerted on the top of the bottle can be calculated by using the relation which relates the force, momentum change and the time.
The expression for the momentum change is,
Here, is the change in momentum,
is the student’s fist, and
is the velocity.
Here, the velocity is negative as the force is direction along downward direction.
The expression of the force exerts on the top of the bottle is,
Here, is the force exerts on the top of the bottle,
is the change in time.
The expression for the change in momentum is,
Substitute for
,
for
.
The expression for the force exerts on the top of the bottle is,
Substitute for
,
for
.
The force exerts on the top of the bottle is.
Concepts used in the answer:- definition of
force as rate of change of linear momentum has been used for this
answer...***************************************************************************************************
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