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Sahay Sir > Question Answers > NCERT Exemplar Class 11 > Physics > Chapter 4 - Laws of Motion > A helicopter of mass 1000 kg rises with a vertical acceleration of 15ms^−2 The crew and the passengers weight 300 kg Give the magnitude and direction of (a) force on the floor by the the crew and passengers (b) action of the rotor of the helicopter on surrounding air (c) force on the helicopter due to surrounding air

A helicopter of mass 1000 kg rises with a vertical acceleration of 15ms^−2 The crew and the passengers weight 300 kg Give the magnitude and direction of (a) force on the floor by the the crew and passengers (b) action of the rotor of the helicopter on surrounding air (c) force on the helicopter due to surrounding air

A shell of mass 0.020kg is fired by a gun of mass 100kg. If the muzzle speed of the shell is 80m/s. what is the recoil speed of the gun?