Question

Consider the following two statements
I. Linear momentum of a system of particles is zero.
II. The kinetic energy of a system of particles is zero. Then

• A. I implies II and II implies I
• B. I does not imply II and II does not imply I
• C. I implies II but II does not imply I
• D. I does not imply II but II implies I

Answer 1

Answer: (D)

K.E is a scalar. Since it is zero, every individual velocity is zero. Momentum is a vector. If it is zero, it does not imply every velocity of particles in the system is equal to zero