Q. A ball is dropped from height $10\ m$. Ball is embedded in sand $1\ m$ and stops, then
A) Only momentum remains conserved
B) Only kinetic energy remains conserved
C) Both momentum and K.E. are conserved
D) Neither K.E. nor momentum is conserved
Explanation
(a) Momentum of earth-ball system remains conserved
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.