Wo asteroids exert a gravitational force, f, on each other. some time later, the asteroids are now three times as far from each other as before. which of the following represents the gravitational force at this distance?

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You can find results and justify them? you can test your hypothesis

Sublimation- which change of state is shown in model

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