Home / study / science / physics / physics questions and answers / a person's near point is 20 cm and her far point is 2 m. her contact lenses are designed so question: a person's near point is 20 cm and her far point is 2 m. her contact lenses are designed so that a person's near point is 20 cm and her far point is 2 m. her contact lenses are designed so that she can see objects that are infinitely far away. what is the closest distance that she can see an object clearly when she wears contacts?

Ithink the answer would be a

W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j