2. Particle A with mass 9.0 [kg] is at rest relative to the lab frame. What is the particle's energy and momentum as measured by a rocket frame moving to the +r- direction with speed 0.80 relative to the lab frame? A. E = 9.0 (kg), P. = 7.2 [kg] B. E = 9.0 [kg]. Pz -7.2 (kg] 12 (kg] = C. E = 15 (kg), Pr = D. E = 15 (kg), P. = -12 [kg]
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