Q2 of 46 Page 249

The figure represents two bodies of masses 10 kg and 15 kg, moving with an initial velocity of 10 ms-1 and 5 ms-1 respectively. They collide with each other. After collision, they move with velocities 4 ms-1 and 9 ms-1 respectively. The time of collision is 2 s. Now calculate F1 and F2

Acceleration of 10 kg mass =

Acceleration of 15 kg mass =


Where v is the final velocity,


u is the initial velocity,


t is the time taken.


Force on 15 kg mass,


F1 = m1a1


= 15×2


= 30 N


Force on 10 kg mass,


F2 = m2a2


= 10×(-3)


= -30 N


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