Employ 5.98 × 1024 kg as the mass of the Earth. A meteorite of 1680 kg consists of a speed of 184 m/s just prior to colliding head-on with the Earth. Find out the recoil speed of the Earth. Answer must be in units of m/s.
An attack helicopter is equipped having a 20-mm cannon which fires 201 g shells in the forward direction with the muzzle speed of 749 m/s. The completely loaded helicopter consists of a mass of around 4550 kg. A burst of 132 shells is fired in the 3.14 s interval.
Determine the resultant average force on the helicopter?