For each of the following statements determine whether it is correct or incorrect.
A.The work done to raise a box onto a platform depends on how fast it is raised.
B.The kinetic energy is independent of the reference frame of the observer.
C.The kinetic energy of an object depends on the direction of the motion involved.
D.The kinetic energy can never be negative.
E.Spring A and B are identical except that A is stiffer than B; that is kA > kB. More work must be expended on spring A if both springs are stretched by the same amount.
F.If the Earth revolves around the sun in a perfectly circular orbit, then the sun does work on the Earth.
The Attempt at a Solution
Which one(s) are wrong?? I thought I had them right but I don't.