Question:
Two blocks of masses 10 kg &20 kg moving at a speed of 10m/s &20m/s respectively in opposite directions, approach each other and collide. If the collision is completely inelastic, find the thermal energy developed in the process
Answer:
The final velocity of the combination is v (let) towards the initial direction of the 20 kg body Hence the Eq of the conservation of momentum is
(20*20)-(10*10)= 30v
Hence v=10m/s
From the conservation of the total energy we get,
1/2(20*20²+10*10²)=H+1/2(30*10²)
Solving we get H=2000 J
=2 kJ
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