Es Test: Flag this Question 5)
Base your answer on the information below.
A ball is projected vertically upward from the surface of the Earth with an initial speed of +49
meters per second. The ball reaches its maximum height in 5.0 seconds. (Disregard air
resistance.)
A
What is the maximum height reached by the ball?
A)
24.5 m
B
49.0 m
C)
122.5 m
D)
245 m

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

One answer could be erosion

En espanol amigo por favor