Question

A light and a heavy body have equal momenta. Which one has greater K.E

• A. The light body
• B. The heavy body
• C. The K.E. are equal
• D. Data is incomplete

Answer 1

Answer: (A)

The light body

Answer 2

$E = \frac { P ^ { 2 } } { 2 m }$ if P = constant then $E \propto \frac { 1 } { m }$