Q84 · Practice questionComplex familiar4 marks
QUESTION 84 (4 marks)
A proton moves at . Determine the ratio of its relativistic momentum to its classical momentum and explain the physical significance of this ratio.
WORKED SOLUTION
4 marksPractice marking scheme
ANSWER
.
Worked solution
Thus the actual relativistic momentum is more than three times the classical estimate. As speed approaches , rises strongly, so ever-increasing momentum and energy are required for smaller increases in speed.
Recognises ratio equals gamma.
Calculates gamma.
States numerical ratio.
Explains significance near light speed.
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