A 4610 kg helicopter accelerated upwards at 2 m/s^2. What lift force is exerted by the air on the propellers?

The air force on the prop blades is what accelerates the helicopter upward.

Use good old Newton's second law:

F = M a

45411

To determine the lift force exerted by the air on the propellers of the helicopter, you can use Newton's second law, which states that the force acting on an object is equal to its mass multiplied by its acceleration.

The given facts are:
Mass of the helicopter (m) = 4610 kg
Acceleration upwards (a) = 2 m/s²

Using the formula for force (F = m * a), we can calculate the lift force exerted by the air on the propellers:

F = m * a
F = 4610 kg * 2 m/s²
F = 9220 N

Therefore, the lift force exerted by the air on the propellers of the helicopter is 9220 Newtons.