0 votes
14.3k views
in Physics by (69.4k points)

(a) Can kinetic energy of a system be changed without changing its momentum? 

(b) Can momentum of a system be changed without changing its kinetic energy?

1 Answer

+1 vote
by (68.9k points)
selected by
 
Best answer

(a) Yes;In explosion of a bomb or inelastic collision between two bodies as force is internal, momentum is conserved while kinetic energy changes.

(b) Yes; If a force acts perpendicular to motion, work done will be zero and so kinetic energy will remain constant. However, the force will change the direction of motion and so, the momentum, e.g., in case of uniform circular motion of a body KE is constant while momentum changes.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...