Question 7

Two lumps of putty are moving in opposite directions, each one having a speed of 3 m/s. They collide and stick together. If the rest mass of each lump is exactly 10 kg before the collision and if no energy is lost to the environment, use the special theory of relativity to calculate how much more than 20 kg is the rest mass of the system after the collision.

• A. 1.6*10^(-19) J
• B. 1.0*10^(-15) kg
• C. 1.0*10^(-15) J
• D. 3.0*10^(-7) kg
• E. 5.0*10^(-16) kg
• F. Zero

Formula Sheet

Question 6

Question 8

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