A helicopter of m ass 1000 kg rises with a vertical a c c ele ra tio n o f 15 `ms-^(2)` . The crew an d th e passengers weigh 300 kg. Give the magnitude and direction of the,
(a) Force on th e floor by th e 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.

Explanation

Mass of helicopter `m_(1) = 100 kg`
mass of passanger and crew `m_(2) = 300 kg`
(a ) Normal force due to to crew and passanger be
`R_(1) - mg = m_(2) a`
`R_(1) =m_(2) ( g + m_(2))`
`=300 (10+ 15) `
`=300 xx 25 `
`R_(1) = 75000 N to ` in unpward direction
( b ) Force acting on surrounding air due to rotor of helicopter .
`(m_(1) + m_(2) ) g + (m_(1) + m_(2) )a`
`=1300 xx 25 `
`F= 32500 N `
(c ) By Newton third of motion action and reaction are equal in mgnitude and in oppsite direction
`:.` Force acting on helicopter due to surrounding air 32500 N