Which of the following statements about the sign of translational kinetic energy is…
PHYSICS · Single correct · CBSE · Physics · Work and Energy · Work and Energy
Problem
Which of the following statements about the sign of translational kinetic energy is most accurate?
(a) Kinetic energy is negative when an object’s velocity is in the negative x-direction.
(b) Kinetic energy can be negative in reference frames moving opposite the object’s motion because the velocity becomes negative relative to that frame.
(c) Kinetic energy is never negative because it depends on the square of speed, which is always positive.
(d) Kinetic energy becomes negative whenever an object decelerates, since its velocity is decreasing.