Question

A 4500 -kg helicopter accelerates upward at $2.0 \mathrm{m} / \mathrm{s}^{2}$ What lift force is exerted by the air on the propellers?

   A 4500 -kg helicopter accelerates upward at $2.0 \mathrm{m} / \mathrm{s}^{2}$ What lift force is exerted by the air on the propellers?

Physics Principle and Problems

Physics Principle and Problems

Paul W. Zitzewitz,… 1st Edition

Chapter 4, Problem 79

Instant Answer

Solved by Expert Mayukh Banik

06/15/2020

Step 1

This can be done using the formula for gravitational force, which is the mass of the object multiplied by the acceleration due to gravity. In this case, the mass (m) is 4500 kg and the acceleration due to gravity (g) is 9.8 m/s². So, the gravitational force (Fg) Show more…

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A 4500 -kg helicopter accelerates upward at $2.0 \mathrm{m} / \mathrm{s}^{2}$ What lift force is exerted by the air on the propellers?

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Key Concepts

Newton's Second Law

Newton's Second Law states that the net force acting on an object is equal to the mass of the object multiplied by its acceleration (F_net = m × a). This concept is crucial for analyzing the forces acting on any object, as it relates all contributing forces to the resulting acceleration, allowing us to solve for unknown force values when the mass and acceleration are known.

Gravitational Force

Gravitational Force is the force of attraction between any two masses, most commonly experienced as the weight of an object near the Earth's surface. It is calculated by multiplying the mass of the object by the acceleration due to gravity (approximately 9.8 m/s² on Earth) and always acts downward.

Lift Force

Lift Force is the upward force exerted on an object, counteracting gravity, and is essential in the context of flight. For a helicopter, the lift generated by its propellers must not only counterbalance the gravitational force (weight) but also provide any additional upward acceleration, as dictated by Newton's Second Law.

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