A helicopter of mass 2000 kg rises with a vertical acceleration of `15ms^-2`. The total mass of the crew and passengers is 500 kg. Give the magnitude and direction of the (g`=10ms^-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 dur to the surrounding air.

Options

A. `500 N`
B. `1200 N`
C. `12500 N`
D. `10000 N`

Answer

C

Explanation

Given mass of helicopeter `(m_(1))= 200 kg`
Mass of the crew and passengers `m_(2) = 500kg`
Acceleration in vertical direction
`a =15m//s^(2) (uarr) and g = 10 m//s^(2) (darr)`
(a) Force on the floor of the helicopter by the crew and passengers
`m_(2) (g+a) =500 (10+15)N`
`500 xx 25N =12500N` .