# A particle of mass  is moving horizontally with a constant velocity  towards a rigid wall that is moving in opposite direction with a constant speed  . Assuming elastic impact between the particle and wall, the work done by the wall in reflecting the particle is equal to a) (1/2) b) (1/2) c) (1/2) d) None of these

## Question ID - 100239 :- A particle of mass  is moving horizontally with a constant velocity  towards a rigid wall that is moving in opposite direction with a constant speed  . Assuming elastic impact between the particle and wall, the work done by the wall in reflecting the particle is equal to a) (1/2) b) (1/2) c) (1/2) d) None of these

3537

(d)

Next Question :
 A particle of mass 4  is projected from the ground at some angle with horizontal. Its horizontal range is At the highest point of its path it breaks into two pieces of masses and 3  respectively, such that the smaller mass comes to rest. The larger mass finally falls at a distance  from the point of projection, where  is equal to a) b) c) d) None of these