A helicopter of mass 2000 kg rises with a vertical acceleration of 15 m s^–2. The total mass of the crew and passengers is 500 kg. Give the magnitude and direction of the (g = 10 m s^–2)

(a) Force on the floor of the helicopter by the crew and passengers. 

(b) Action of the rotor of the helicopter on the surrounding air. 

(c) Force on the helicopter due to the surrounding air.

<p><span lang="EN-IN">This is a Long Answer type Questions as classified in NCERT Exemplar</span></p><p><strong><span lang="EN-IN">Explanation</span></strong><span lang="EN-IN">- mass of helicopter m =2000kg </span></p><p><span lang="EN-IN">Mass of the crew and passengers m= 500kg</span></p><p><span lang="EN-IN">Acceleration a =15m/s² and g = 10m/s²</span></p><p>&lt;!- [if !supportLists]-&gt;<strong><span lang="EN-IN">a) </span></strong><span lang="EN-IN">force on the floor of the helicopter by the crew and passengers</span></p><p><span lang="EN-IN">m (g+a)= 500 (10+15)N= 12500N</span></p><p><strong>&lt;!- [if !supportLists]-&gt;<span lang="EN-IN">b) </span></strong><span lang="EN-IN">action of rotor of the helicopter on the surroundings air= (m₁+m₂) (g+a)</span></p><p><span lang="EN-IN">= (2000+500) (10+15)= 2500 (25)= 62500N</span></p><p>&lt;!- [if !supportLists]-&gt;<span lang="EN-IN"><strong>c)</strong>&nbsp;</span><span lang="EN-IN">force on the helicopter due to surroundings air</span></p><p><span lang="EN-IN">= reaction of force applied by helicopter </span></p><p><span lang="EN-IN">= 62500N</span></p>

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