Conceptual Physics: The High School Physics Program
Conceptual Physics: The High School Physics Program
9th Edition
ISBN: 9780133647495
Author: Paul G. Hewitt
Publisher: Prentice Hall
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Textbook Question
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Chapter 12, Problem 38A

Why does a typical small helicopter with a single main rotor have a second small rotor on its tail? Describe the consequence if the small rotor fails in flight.

Expert Solution & Answer
Check Mark
To determine

To Explain: The importance of the second small rotor on the tail of a typical small rotor and the consequence if the small rotor fails in flight.

Explanation of Solution

Introduction:

Helicopter rotor is connected by the engine through the rotating mast. The rotor has large diameter and designed to operate at fixed round per minute which generates the horizontal thrust.

The small rotor is held vertically near the tail of a helicopter which is also used to generate the horizontal thrust.

Main rotor of the helicopter provides the upward force perpendicular to the plane of main rotor which works against the force of gravity while the small rotor on the tail is designed to cancel out the torque of the main rotor.

In the case if small rotor fails, the helicopter would rotate in the opposite direction to that of the main rotor and would fall to the ground.

Conclusion:

Therefore, the main function of the small rotor on the tail of the helicopter is to cancel out the torque produced by main rotor otherwise helicopter would fall on the ground.

Chapter 12 Solutions

Conceptual Physics: The High School Physics Program

Ch. 12 - The text says that angular momentum is 10, then...Ch. 12 - Momentum is conserved when there is no net...Ch. 12 - What does it mean to Say that angular momentum is...Ch. 12 - If a skater who is spinning pulls her arms in so...Ch. 12 - If a skater who is spinning pulls her arms in so...Ch. 12 - Why are your answers different to the previous two...Ch. 12 - How can gravity be simulated in an orbiting space...Ch. 12 - How will the value of g vary at different...Ch. 12 - Three iron shapes of the same mass rotate about...Ch. 12 - Beginning from a rest position, a solid disk A, a...Ch. 12 - Perky rides at different radial distances from the...Ch. 12 - Students Art, Bart, Cis, and Dot sit on a rotating...Ch. 12 - Mei Fan says that a basketball has greater...Ch. 12 - Stand two metersticks against the wall and let...Ch. 12 - Why is a stick with a wad of clay at the top...Ch. 12 - Prob. 26ACh. 12 - If you walked along the top of a fence, why would...Ch. 12 - Which will have the greater acceleration rolling...Ch. 12 - Any rolling object takes more time to roll down an...Ch. 12 - Jim says that in race between a can of water and a...Ch. 12 - Consider two rotating bicycle wheels, one filled...Ch. 12 - You sit in the middle of a large, freely rotating...Ch. 12 - A sizable quantity of soil is washed down the...Ch. 12 - If all of Earths inhabitants moved to the equator,...Ch. 12 - If the worlds populations move to the North and...Ch. 12 - If the polar ice caps of Earth were to melt, the...Ch. 12 - A toy train is initially at rest on a track...Ch. 12 - Why does a typical small helicopter with a single...Ch. 12 - We believe our galaxy was formed from a huge cloud...Ch. 12 - An occupant inside a rotating space habitat of the...Ch. 12 - Explain why the faster Earth spins, the less a...Ch. 12 - What happens to the rotational inertia of a simple...Ch. 12 - What happens to the rotational inertia of a simple...Ch. 12 - What happens to the rotational inertia of a simple...Ch. 12 - A pair of identical 1000-kg space pods in outer...Ch. 12 - The two-pod system in the previous question...Ch. 12 - Gretchen moves at a speed of 6.0 m/s when sitting...Ch. 12 - If a trapeze artist rotates twice each second...Ch. 12 - A 0.60-kg puck revolves at 2.4 m/s at the end of a...Ch. 12 - Gather a selection of canned foods. Predict which...
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