Q. 44

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Found in: Page 180

### Physics for Scientists and Engineers: A Strategic Approach with Modern Physics

Book edition 4th
Author(s) Randall D. Knight
Pages 1240 pages
ISBN 9780133942651

# A helicopter is flying horizontally. A crate is suspended from the helicopter by a massless cable that is constantly from vertical. What propulsion force F u prop is being provided by the helicopter’s rotor? Air resistance can be ignored. Give your answer in component form in a coordinate system where points in the direction of motion and points upward.

Propulsion force,

See the step by step solution

## Step 1: Given information

The mass of the helicopter

The mass of the crate

## Step 2: Explanation

The expression to calculate the vertical component of force is,

The cable makes an angle with the vertical component of the force.

The acceleration of both the systems remains the same so, the horizontal component of the force on the system is given as,

Now calculate vertical force using

Therefore the propulsion force provided by the helicopter's rotor is