Question
Physics Question on Kinetic Energy
Which of the following quantities measured from different inertial reference frames are same?
A
Force
B
Velocity
C
Displacement
D
Kinetic energy
Answer
Kinetic energy
Explanation
Solution
In an inertial frame, an object or body accelerates only when a physical force is applied and in the absence of a net force, a body at rest will remain at rest and a body in motion will continue to more uniformly. Kinetic energy being a scalar quantity, hence measured from different inertial frame gives the same value, while the other three being vector quantities their values vary.