When two inertial observers who are moving at a constant speed relative to one…
PHYSICS · Single correct · AP · Physics 1: Algebra-based · Kinematics · Kinematics
Problem
When two inertial observers who are moving at a constant speed relative to one another each calculate the translational kinetic energy of the same object, which of the following quantities must be different for the two observers, thereby causing their calculations to yield different kinetic energies?
(a) the momentum they measure for the object
(b) the mass they attribute to the object
(c) the speed they measure for the object
(d) the gravitational potential energy of the object