Aruba Landsexamen VWO Practice Questions - Aruba Landsexamen VWO (Pre-University State Examination) Exam

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According to Einstein's Special Theory of Relativity, what happens to the relativistic mass and observed time of an object moving relative to a stationary observer at a velocity v = 0.8c (where c is the speed of light)? (Lorentz factor gamma = 1 / sqrt(1 - v^2/c^2) = 1 / sqrt(1 - 0.64) = 1 / 0.6 = 1.67)

Observed time runs faster by a factor of 1.67 and mass decreases. Observed length expands by a factor of 1.67 along the direction of motion. Observed time is dilated (clocks run slower by a factor of 1.67) and relativistic momentum/energy increases by a factor of 1.67. The speed of light relative to the object drops to 0.2c.

Correct Answer:

Observed time is dilated (clocks run slower by a factor of 1.67) and relativistic momentum/energy increases by a factor of 1.67.

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