An attack helicopter is equipped with a 20mm cannon that fires 143 g shells in the forward direction with a muzzle speed of 1040 m/s.

An attack helicopter is equipped with a 20mm cannon that fires 143
g shells in the forward direction with a muzzle speed of 1040 m/s. The fully loaded helicopter has a mass of 5920 kg. A burst of 229 shells is fired in a 5.19 s interval.
What is the resulting average force on the helicopter?
Answer in units of N.
 
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