Two blocks of masses `10kg and 20kg` moving at speeds of `10ms^(-1) and 20ms^(-1)` respectively in opposite direction approach each other and colide .If the collision is completely inelastic , find the thermal energy developed in the process

A 10kg ball and 20kg ball approach each other with velocities 20ms^(-1) and 10ms^(-1) respectively. What are their velocities after collision if the collision is perfectly elastic?

A 10 kg ball and 20 kg ball approach each other with velocities 20 ms^(-1) and 10 ms^(-1) respectively . What are their velocities after collision if the collision is perfectly elastic ?

Two bodies of masses 4kg and 2kg are moving towards each other with 3ms and 2ms! respectively. Then velocity of centre of mass

Two lead spheres of masses 10kg and 30k approach each other with speeds 10ms^(-1) and 20ms^(-1) and collide completely inelastically. What is the heat produced by the collision? What is the rise in temperature if all the heat produced is ratained by the spheres? (Specific heat capacity of lead =31 cal kg^(-1)K^(-1) and J=4.2 joules cal^(-1) )