# A stationary body of mass 3 kg explodes into three equal pieces. Two of the pieces fly off at right angles to each other. One with a velocity of 2 m/s and the other with a velocity of 3 m/s.If the explosion takes place in s, the average force acting on the third piece in newtons is a) ( ) b) ) c) ( ) d) ( ) ## Question ID - 100221 :- A stationary body of mass 3 kg explodes into three equal pieces. Two of the pieces fly off at right angles to each other. One with a velocity of 2 m/s and the other with a velocity of 3 m/s.If the explosion takes place in s, the average force acting on the third piece in newtons is a) ( ) b) ) c) ( ) d) ( ) 3537

 (b) Since the body explodes into three equal parts, therefore Let the velocity of the third part be According to the principle of conservation of linear momentum, Momentum of system before explosion=Momentum of system after explosion Or Or or ) m/s Average force acting on the third particle is Next Question :

Five balls are placed one after the other along a straight line as shown in the figure. Initially, all the balls are at rest. Then the second ball has been projected with speed towards the third ball. Mark the correct statements. (Assume all collisions to be head-on and elastic) a) Total number of collisions in the process is 5 b) Velocity of separation between the first and fifth ball after the last possible collision is c) Finally, three balls remain stationary d) All of the above 