A helicopter is moving horizontally to the right at a constant velocity. The weight of the helicopter is W = 57600 N. The lift force L generated by the rotating blade makes an angle of 21.0° with respect to the vertical.(adsbygoogle = window.adsbygoogle || []).push({});

(a) What is the magnitude of the lift force in N?

(b) Determine the magnitude of the air resistance R that opposes the motion.

I used [tex]\Sigma[/tex]F_{x}= ma_{x}--> 0 (because constant velocity means 0 acceleration)= Lsin(21)

and [tex]\Sigma[/tex]F_{y}= ma_{y}-->Lcos21-57600

now I dont know what to do. What did i do wrong?

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Newton's 2nd Law confusing!

**Physics Forums | Science Articles, Homework Help, Discussion**