Concept explainers
To Calculate: The speed of copper blocks before the collision.
Answer to Problem 76A
Explanation of Solution
Given:
Mass of copper blocks,
Initial speed of two blocks is same but they move towards each other and hence, collide.
Final speed of blocks is zero.
Change in temperature of the blocks is
All the kinetic energy is converted into thermal energy.
Formula Used:
Thermal energy can be obtained by:
Where, m is the mass, c is the specific heat capacity and
Kinetic energy can be obtained by:
Where, m is the mass, v is the final speed and u is the initial speed.
Calculation:
For thermal equilibrium:
Kinetic energy lost by copper block = thermal energy
Specific heat of copper
Conclusion:
Thus, the speed of blocks before collision is
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