The answer for this question, If I am correct, should be answer "D".
A and C Im pretty sure :)
Answer:B
Explanation:
Given
mass of Sled is m
another package of mass m is thrown on it
Suppose u be the initial velocity of sled
conserving momentum
where v is the final velocity
Initial kinetic energy
Final Kinetic Energy
Final Kinetic Energy
Final kinetic Energy is half of initial