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Energy and Momentum
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Problems on Energy and Momentum

 
Problem 1.1: What is the energy of a particle with mass 3.2×10-27 kilograms and velocity 0.9c? [Solution]
Problem 1.2: A particle has a momentum with magnitude 1.2×105 kgm/s and energy 4.42×10-11 Joules. What is its mass? [Solution]
Problem 1.3: Two protons approach each other from opposite direction, traveling with equal and opposite speeds 0.6c. The collide to form a single particle that is at rest. What is the mass of this particle? (The proton mass is 1.67×10-27 kilograms). [Solution]
Problem 1.4: A particle of mass m and speed v approaches an identical particle at rest. The particles stick together to form larger particle with mass M. What is the speed of the larger particle after the collision? [Solution]
Problem 1.5: Two particles with equal mass m approach each other with speed u. They collide to form a single particle with mass M, which is at rest. Show the energy is conserved in the frame of the M particle. [Solution]
 
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