A rocket has an exhaust speed of 2.5 × 10^3 m/s, and produces 7.5 × 10^5 N of instantaneous thrust. What mass of fuel does the rocket burn each second?

a. 3.30 × 10^–3 kg/s
b. 17.1 kg/s
c. 300 kg/s
d. 1.90 × 10^9 kg/s


c

Physics & Space Science

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A uniform rod is hinged to a wall and held at a 30° angle by a thin string that is attached to the ceiling and makes a 90° angle to rod. Which statement(s) must be true? (At least one of them is true and at least one is false.)

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Physics & Space Science