deseryzepeda0ugygg6 deseryzepeda0ugygg6
  • 01-09-2020
  • Physics
contestada

If the toy helicopter weighs 115 N and is hovering motionless in the air, which of these options MOST accurately describes the force that the helicopter's propeller must exert?

Respuesta :

facundo3141592
facundo3141592 facundo3141592
  • 07-09-2020

Answer:

If the helicopter is not moving, then it is not being accelerated.

By second Newton's law we have that:

F = m*a

Force equals mass times acceleration.

Then if we do not have acceleration, we have:

F = m*a = m*0 = 0.

Then the total force must be zero.

So if the gravitational force (pulling down) is 115N, then the force of the propeller must be such that:

Total force = F - 115N = 0

F = 115N

The force of the propeller must be also of 115N, but in the opposite direction.

Answer Link

Otras preguntas

give related words and complete the web - Picnic​
A parachutist relies on air resistance (mainly on her parachute) to decrease her downward velocity. She and her parachute have a mass of 58.0 kg and air resista
SUPER URGENT PLZ HELP After this State of the Union Address, the statement that the annexation of Texas was born of a "choice of the people themselves to share
Find the sum of the first 100 terms of the sequence below: -19, -15, -11, -7, -3, ... S100
which of the following is equal to the square root of 27/16
China and Japan In the Middle Ages mastery test edmentum
i love old cottages/ the old cottage villages/ the villages are usually quieter than towns/ the town
What is the distance between the following points? y + +++ 3 1 2 3 4 5 6 7 8 9 . -27 -3+ -4 -5+ -6 -7 -8
HELLLPPPPP!!!!!!!!!!!!!!!!!!
Help please! its very time sensitive!!​