While Astronauts in a Spaceship with a Speed of 0

question 54

Multiple Choice

While astronauts in a spaceship with a speed of 0.6c relative to Earth move outward from Earth toward Jupiter,they observe a cosmic ray shower that contains particles moving toward them at 0.2c relative to Earth.One of the particles has a rest energy of 3.0 GeV and a momentum,as measured by the astronauts,of 4.0 GeV/c.Its kinetic energy is

• A)7.0 GeV
• B)4.0 GeV
• C)5.0 GeV
• D)2.7 GeV
• E)2.0 GeV

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