How does an object’s motion change as a result of centripetal acceleration? the speed decreases in the same direction. the speed increases in the same direction. the direction changes along with the speed. the direction changes but not the speed.

When we look at centripetal acceleration, the acceleration is a change in velocity. Since velocity is a vector, when we change direction, we have an acceleration even if the speed is not changing. An object's motion changes direction but does not change in speed when looking at centripetal acceleration.

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