A firework rocket of mass 100 g uses 150 J of chemical energy to reach a height of 60 m

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Work Energy and Power · Work Energy and Power

Problem

A firework rocket of mass 100 g uses 150 J of chemical energy to reach a height of 60 m. Which of the following is the best estimate of the efficiency of the rocket? (1) 0.2 (2) 0.3 (3) 0.4 (4) 0.5

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