E3 Quiz A cart is traveling along a track and slows down due to friction. Which of the statements below best explains why the cart slows down, in terms of
energy?
A- Kinetic energy from the cart is converted to thermal energy in the track
OB - Kinetic energy from the cart is converted to thermal energy in the cart
OC - Kinetic energy from the cart is converted to potential energy in the cart
D - All of the above
E-A and B only
F. None of these
1 2 3 4 5 6 7 8 9 10

It's have to be 12 or idk

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

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