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16-06-2024
Physics

Answered

Nine strap-on rocket motors or graphite-epoxy motors (GEMS), are used to increase the main engine thrust. For the Rover A mission, which uses the standard Delta II 7925 launch vehicle, the GEMs are 1016 mm (40 in) in diameter and are fueled with approximately 12,000 kg (26,400 lbs) of hydroxyl-terminated polybutadiene. Each GEM provides an average thrust of 498,000 N (112,000 lbs). Six of the nine GEMs are ignited at the time of lift-off. The remaining 3, with extended nozzles, are ignited shortly after the initial 6 GEMs burn out and when the spacecraft is lighter due to the burning of fuel from Stage I.
What is the total amount of thrust (in newtons) provided by the initial 6 gems?

Answer :

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